Difference between revisions of "Lactuca"

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__NOTOC__{{Plantbox
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| name = ''Lactuca''
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| common_names = Lettuce
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| growth_habit = ?  <!--- tree, shrub, herbaceous, vine, etc -->
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| high = ?  <!--- 1m (3 ft) -->
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| wide =    <!--- 65cm (25 inches) -->
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| origin = ?  <!--- Mexico, S America, S Europe, garden, etc -->
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| poisonous =    <!--- indicate parts of plants which are known/thought to be poisonous -->
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| lifespan =    <!--- perennial, annual, etc -->
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| exposure = ?  <!--- full sun, part-sun, semi-shade, shade, indoors, bright filtered (you may list more than 1) -->
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| water = ?  <!--- frequent, regular, moderate, drought tolerant, let dry then soak -->
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| features =    <!--- flowers, fragrance, fruit, naturalizes, invasive -->
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| hardiness =    <!--- frost sensitive, hardy, 5°C (40°F), etc -->
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| bloom =    <!--- seasons which the plant blooms, if it is grown for its flowers -->
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| usda_zones = ?  <!--- eg. 8-11 -->
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| sunset_zones =    <!--- eg. 8, 9, 12-24, not available -->
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| color = IndianRed
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| image = Lactuca_tuberosa.jpg
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| image_width = 180px    <!--- leave as 240px if horizontal orientation photo, or change to 180px if vertical -->
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| image_caption = Lactuca tuberosa
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| regnum = Plantae
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| divisio = Magnoliophyta
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| classis = Magnoliopsida
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| ordo = Asterales
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| familia = Asteraceae
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| genus = Lactuca
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}}
 
{{Inc|
 
{{Inc|
 
Lactuca (from the old Latin name lac; referring to the milky juice). Compositae. Lettuce. A well-known group of hardy annual or perennial herbs, mostly native of the northern hemisphere.
 
Lactuca (from the old Latin name lac; referring to the milky juice). Compositae. Lettuce. A well-known group of hardy annual or perennial herbs, mostly native of the northern hemisphere.
  
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Plants 2-4 or more feet high, with alternate, variously shaped lvs. and small-panicled heads of yellow, white or blue fls.: involucre cylindric, its bracts imbricated in several series; receptacle flat, naked; rays cut off even at apex, and 5-toothed. — More than 200 specific names have been given to the genus, probably half of which are synonyms with but only 8 or 9 known in cult., and these are doubtless forms of but 2 or 3 species. Aside from garden lettuce, only 1 species appears to be in the trade, though wild plants of other species are often gathered for medicinal purposes.  All of the species possess narcotic and sedative properties, the sedative known as lactucarium, or lettuce-opium, being obtained principally from the European species, L. virosa. Lettuce has been known and used as a salad from a very remote period. It is said to have been served at the tables of Persian kings 400 B. C. See Lettuce.
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Plants 2-4 or more feet high, with alternate, variously shaped lvs. and small-panicled heads of yellow, white or blue fls.: involucre cylindric, its bracts imbricated in several series; receptacle flat, naked; rays cut off even at apex, and 5-toothed. — More than 200 specific names have been given to the genus, probably half of which are synonyms with but only 8 or 9 known in cult., and these are doubtless forms of but 2 or 3 species. Aside from garden lettuce, only 1 species appears to be in the trade, though wild plants of other species are often gathered for medicinal purposes.  All of the species possess narcotic and sedative properties, the sedative known as lactucarium, or lettuce-opium, being obtained principally from the European species, L. virosa. Lettuce has been known and used as a salad from a very remote period. It is said to have been served at the tables of Persian kings 400 B. C. See [[Lettuce]].
  
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Lactuca sativa, Lettuce. An annual plant, not known in the wild state but generally supposed to have originated from L. Scariola,Linn., in Asia. There are many garden forms assuming an endless variety of forms but which may be divided into 4 rather distinct types.
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[[Lactuca sativa]], Lettuce. An annual plant, not known in the wild state but generally supposed to have originated from L. Scariola,Linn., in Asia. There are many garden forms assuming an endless variety of forms but which may be divided into 4 rather distinct types.
  
 
Var. capitata (L. capitata). Common Cabbage Lettuce. Lvs. entire or sparingly dentate, broad, rounded, yellowish or brownish green, more or less wrinkled and in some garden varieties much curled, spreading, 6-14 in., usually quite compact.
 
Var. capitata (L. capitata). Common Cabbage Lettuce. Lvs. entire or sparingly dentate, broad, rounded, yellowish or brownish green, more or less wrinkled and in some garden varieties much curled, spreading, 6-14 in., usually quite compact.
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Var. romana, Cos Lettuce. One to 2 ft. high: lvs. entire or sparingly dentate, much longer than broad, quite erect, forming a cylindrical or conical- shaped plant.
 
Var. romana, Cos Lettuce. One to 2 ft. high: lvs. entire or sparingly dentate, much longer than broad, quite erect, forming a cylindrical or conical- shaped plant.
  
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Var. angustana (L. angustana). Lvs. 1-2 in. wide, 6-12 in. long, entire, slightly spreading in habit.
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Lactuca var. angustanam (L. angustana). Lvs. 1-2 in. wide, 6-12 in. long, entire, slightly spreading in habit.
  
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Lactuca plumieri, Gren. & Godr. St. about 6 ft., stout: lvs. much cut, broadly oblong, bluish on the under side: fl.-heads terminal, corymbose, the rays purple. S. France. June-Aug.
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Lactuca plumieri. & Godr. St. about 6 ft., stout: lvs. much cut, broadly oblong, bluish on the under side: fl.-heads terminal, corymbose, the rays purple. S. France. June-Aug.
  
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L. Bourgaei (Boiss.) , is a thick-stemmed bristly-lvd. perennial often 6 ft. tall: heads small, with pinkish bracts and lilac rays. Medit. region. — L. canadensia, Linn. Biennial or annual 4-9 ft. high: lvs. entire or nearly so. Wild plants often gathered for salad.— L. perennis, Linn. Root perennial, 2-3 ft. high: Ivs. 8-10 in. long, deeply cut: fls. large, light blue. Native of Eu. — L. Scariola. Linn. Prickly Lettuce. Annual or biennial, sometimes 6 ft. high, the st. stiff and often paniculately branched: lvs. 1-2 in. wide, 4-6 in. long: fls. yellow, inconspicuous. Intro, from Old World, and now a widely distributed weed.
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Lactuca Bourgaei (Boiss.) , is a thick-stemmed bristly-lvd. perennial often 6 ft. tall: heads small, with pinkish bracts and lilac rays. Medit. region. — L. canadensia, Linn. Biennial or annual 4-9 ft. high: lvs. entire or nearly so. Wild plants often gathered for salad.— L. perennis, Linn. Root perennial, 2-3 ft. high: Ivs. 8-10 in. long, deeply cut: fls. large, light blue. Native of Eu. — L. Scariola. Linn. Prickly Lettuce. Annual or biennial, sometimes 6 ft. high, the st. stiff and often paniculately branched: lvs. 1-2 in. wide, 4-6 in. long: fls. yellow, inconspicuous. Intro, from Old World, and now a widely distributed weed.
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}}
 
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{{Taxobox
 
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| color = lightgreen
 
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| name = Lettuce
 
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| image = Lactuca_tuberosa.jpg
 
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| image_width = 200px
 
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| image_caption = ''Lactuca tuberosa''
 
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| regnum = [[Plant]]ae
 
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| divisio = [[Flowering plant|Magnoliophyta]]
 
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| classis = [[Magnoliopsida]]
 
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| ordo = [[Asterales]]
 
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| familia = [[Asteraceae]]
 
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| genus = '''''Lactuca'''''
 
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| genus_authority = [[Carolus Linnaeus|L.]], [[1753]]
 
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| subdivision_ranks = Genera
 
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| subdivision =
 
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See text.
 
 
}}
 
}}
  
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'''''Lactuca''''', commonly known as [[lettuce]],  is a genus of flowering plants in the Sunflower family [[Asteraceae]]. The genus includes about 100 species, distributed worldwide, but mainly in temperate [[Eurasia]].
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==Cultivation==
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{{edit-cult}}<!--- Type cultivation info below this line, then delete this entire line -->
  
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[[Image:Lactucaserriola2web.jpg|thumb|left|250px|Prickly Lettuce (''Lactuca serriola'')]]
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===Propagation===
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{{edit-prop}}<!--- Type propagation info below this line, then delete this entire line -->
  
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Its best-known representative is the [[lettuce|garden lettuce]] (''Lactuca sativa''), with its many varieties. But many are just common [[weed]]s. They are annuals or perennials. Their height can vary between 10-180 cm. They form [[Inflorescence|heads or capitula]] in panicles of yellow, brown or purple flowers in ray florets.
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===Pests and diseases===
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{{edit-pests}}<!--- Type pest/disease info below this line, then delete this entire line -->
  
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The non-edible species may contain bitter elements. Others contain a milky juice.
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==Species==
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<!--  Country of origin can be removed for all - not very important for gardeners needs    -->
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''Lactuca'' species are used as food plants by the [[larva]]e of a number of [[Lepidoptera]] species - see [[list of Lepidoptera which feed on Lettuces]].
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*''[[Lactuca abyssinica]]''
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*''[[Lactuca acanthifolia]]''
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== Wild Lettuce ==
 
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'''Wild Lettuce''' commonly refers to the more bitter cousins of common garden lettuce. This group of plants is used in everything from sleep tonics to soap to teas. The three main species of this group are ''Lactuca Virosa, Lactuca Canadennis,'' and ''Lactuca Serriola''.
 
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[[Image:Lactuca-virosa.jpg|thumb|right|250px|Wild Lettuce (''[[Lactuca virosa]]'') <br /> from Thomé ''Flora von Deutschland, Österreich und der Schweiz'' 1885]]
 
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== Species ==
 
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*''[[Lactuca abyssinica]]'' : ([[Ethiopia]])
 
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*''Lactuca acanthifolia'' : ([[Crete]])
 
 
**''Lactuca acanthifolia'' f. ''amorgina''  
 
**''Lactuca acanthifolia'' f. ''amorgina''  
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**''Lactuca acanthifolia'' f. ''integrifolia'' : ([[Greece]], [[Turkey]])
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**''Lactuca acanthifolia'' f. ''integrifolia''
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*''Lactuca aculeata'' : ([[Asia Minor]])
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*''[[Lactuca aculeata]]'' : ([[Asia Minor]])
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*''Lactuca acuminata''  
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*''[[Lactuca acuminata]]''  
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*''Lactuca adenophora'' : ([[Armenia]])
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*''[[Lactuca adenophora]]'' : ([[Armenia]])
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*''Lactuca alabamensis'' : ([[North America]])
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*''[[Lactuca alabamensis]]'' : ([[North America]])
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*''Lactuca alatipes'' : ([[India]])
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*''[[Lactuca alatipes]]'' : ([[India]])
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*''Lactuca albiflora'' : ([[Japan]])
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*''[[Lactuca albiflora]]'' : ([[Japan]])
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*''Lactuca alliariaefolia'' : ([[Korea]])
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*''[[Lactuca alliariaefolia]]'' : ([[Korea]])
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*''Lactuca alpina'' : ([[Europe]])
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*''Lactuca alpina'' (also known as ''[[Cicerbita alpina]]''[http://www.pfaf.org/database/plants.php?Cicerbita+alpina]: ([[Europe]])
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*''Lactuca altaica'' : ([[Altai Mountains]])
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*''[[Lactuca altaica]]'' : ([[Altai Mountains]])
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*''Lactuca amagawaensis'' : (Japan)
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*''[[Lactuca amagawaensis]]'' : (Japan)
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*''Lactuca ambigua'' : (Europe)
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*''[[Lactuca ambigua]]'' : (Europe)
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*''Lactuca amoena'' : (China)
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*''[[Lactuca amoena]]'' : (China)
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*''Lactuca amorgina'' : (Greece)
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*''[[Lactuca amorgina]]'' : (Greece)
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*''Lactuca andongensis'' : (tropical [[Africa]])
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*''[[Lactuca andongensis]]'' : (tropical [[Africa]])
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*''Lactuca angulata'' : (North America)
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*''[[Lactuca angulata]]'' : (North America)
 
*''Lactuca'' × ''aogashimaensis'' : (Japan)
 
*''Lactuca'' × ''aogashimaensis'' : (Japan)
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*''Lactuca arabica'' : (Arabian peninsula)
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*''[[Lactuca arabica]]'' : (Arabian peninsula)
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*''Lactuca atlantica'' : (Algeria)
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*''[[Lactuca atlantica]]'' : (Algeria)
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*''Lactuca atropurpurea'' : (China)
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*''[[Lactuca atropurpurea]]'' : (China)
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*''Lactuca attenuata'' : ([[Congo]])
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*''[[Lactuca attenuata]]'' : ([[Congo Basin|Congo]])
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*''Lactuca auriculata'' : (Himalaya)
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*''[[Lactuca auriculata]]'' : (Himalaya)
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*''Lactuca axillaris'' : (North America)
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*''[[Lactuca axillaris]]'' : (North America)
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*''Lactuca azerbaijanica'' : (Iran)
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*''[[Lactuca azerbaijanica]]'' : (Iran)
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*''Lactuca balmesi'' : (Spain)
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*''[[Lactuca balmesi]]'' : (Spain)
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*''Lactuca bauhini'' : (France)
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*''[[Lactuca bauhini]]'' : (France)
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*''Lactuca benthamii'' : (Himalaya)
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*''[[Lactuca benthamii]]'' : (Himalaya)
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*''Lactuca biauriculata'' : (Korea)
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*''[[Lactuca biauriculata]]'' : (Korea)
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*''Lactuca biennis'' : Tall Blue Lettuce, Wild Blue Lettuce
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*''[[Lactuca biennis]]'' : Tall Blue Lettuce, Wild Blue Lettuce
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*''Lactuca blinii'' : (Korea)
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*''[[Lactuca blinii]]'' : (Korea)
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*''Lactuca boranensis''  
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*''[[Lactuca boranensis]]''  
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*''Lactuca brachyrrhyncha'' (North America, Mexico)
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*''[[Lactuca brachyrrhyncha]]'' (North America, Mexico)
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*''Lactuca brachyrhyncha'' : (China)
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*''[[Lactuca brachyrhyncha]]'' : (China)
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*''Lactuca brassicaefolia'' : (Iran)
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*''[[Lactuca brassicaefolia]]'' : (Iran)
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*''Lactuca brevirostris'' : (East Asia)
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*''[[Lactuca brevirostris]]'' : (East Asia)
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*''Lactuca calophylla'' : (East Africa)
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*''[[Lactuca calophylla]]'' : (East Africa)
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*''Lactuca campestris''
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*''[[Lactuca campestris]]''
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*''Lactuca canadensis'' : Canada Lettuce, Florida Blue Lettuce, Wild Lettuce (North America)
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*''[[Lactuca canadensis]]'' : Canada Lettuce, Florida Blue Lettuce, Wild Lettuce (North America)
 
**''Lactuca canadensis'' var. ''albocaerulea'' (North America)
 
**''Lactuca canadensis'' var. ''albocaerulea'' (North America)
 
**''Lactuca canadensis'' f. ''angustata'' (North America)
 
**''Lactuca canadensis'' f. ''angustata'' (North America)
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**''Lactuca canadensis'' f. ''stenopoda'' : (North America)
 
**''Lactuca canadensis'' f. ''stenopoda'' : (North America)
 
**''Lactuca canadensis'' f. ''villicaulis'' : (SE USA)
 
**''Lactuca canadensis'' f. ''villicaulis'' : (SE USA)
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*''Lactuca canescens'' : (Turkestan)
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*''[[Lactuca canescens]]'' : (Turkestan)
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*''Lactuca capensis'' : (South Africa)
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*''[[Lactuca capensis]]'' : (South Africa)
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*''Lactuca cataonica'' : (Asia Minor)
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*''[[Lactuca cataonica]]'' : (Asia Minor)
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*''Lactuca cavaleriei'' : (China)
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*''[[Lactuca cavaleriei]]'' : (China)
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*''Lactuca chelidonifolia'' : (Japan)
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*''[[Lactuca chelidonifolia]]'' : (Japan)
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*''Lactuca chondrillaeflora'' : (Southern Europe)
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*''[[Lactuca chondrillaeflora]]'' : (Southern Europe)
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*''Lactuca clarkei '' : (Himalaya)
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*''[[Lactuca clarkei]]'' : (Himalaya)
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*''Lactuca coerulea'' : (Austria)
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*''[[Lactuca coerulea]]'' : (Austria)
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*''Lactuca cooperi'' : (India)
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*''[[Lactuca cooperi]]'' : (India)
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*''Lactuca cornigera'' : (Morocco)
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*''[[Lactuca cornigera]]'' : (Morocco)
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*''Lactuca corymbosa'': (Congo)
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*''[[Lactuca corymbosa]]'': (Congo)
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*''Lactuca crambifolia'' : (Turkestan)
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*''[[Lactuca crambifolia]]'' : (Turkestan)
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*''Lactuca crassifolia'' : (Socotra)
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*''[[Lactuca crassifolia]]'' : (Socotra)
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*''Lactuca crepidioides'' : (China)
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*''[[Lactuca crepidioides]]'' : (China)
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*''Lactuca cretica'' : (Crete)
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*''[[Lactuca cretica]]'' : (Crete)
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*''Lactuca deasyi'' : (China)
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*''[[Lactuca deasyi]]'' : (China)
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*''Lactuca debilis'' : (Japan)
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*''[[Lactuca debilis]]'' : (Japan)
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*''Lactuca decorticata'' : (Mediterranean)
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*''[[Lactuca decorticata]]'' : (Mediterranean)
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*''Lactuca deggeleriana'' : (Switzerland)
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*''[[Lactuca deggeleriana]]'' : (Switzerland)
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*''Lactuca deltoidea'' : (Caucasus)
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*''[[Lactuca deltoidea]]'' : (Caucasus)
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*''Lactuca denticulata'' : (Japan)
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*''[[Lactuca denticulata]]'' : (Japan)
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*''Lactuca dissecta'' : (Himalaya)
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*''[[Lactuca dissecta]]'' : (Himalaya)
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*''Lactuca diversifolia'' : (China)
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*''[[Lactuca diversifolia]]'' : (China)
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*''Lactuca dracoglossa'' : (Japan)
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*''[[Lactuca dracoglossa]]'' : (Japan)
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*''Lactuca dregeana'' : (South Africa)
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*''[[Lactuca dregeana]]'' : (South Africa)
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*''Lactuca dubyaea'' : (Himalaya)
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*''[[Lactuca dubyaea]]'' : (Himalaya)
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*''Lactuca dunlapii'' : (Cameroun)
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*''[[Lactuca dunlapii]]'' : (Cameroun)
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*''Lactuca eburnea'' : (Rhodos)
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*''[[Lactuca eburnea]]'' : (Rhodos)
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*''Lactuca edelbergii'' : (Afghanistan)
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*''[[Lactuca edelbergii]]'' : (Afghanistan)
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*''Lactuca elgonensis'' : (Uganda)
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*''[[Lactuca elgonensis]]'' : (Uganda)
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*''Lactuca elongata''
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*''[[Lactuca elongata]]''
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*''Lactuca erythrocarpa '' : (China)
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*''[[Lactuca erythrocarpa]]'' : (China)
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*''Lactuca fischeriana'' : (Siberia)
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*''[[Lactuca fischeriana]]'' : (Siberia)
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*''Lactuca fistulosa'' : (North America)
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*''[[Lactuca fistulosa]]'' : (North America)
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*''Lactuca flavissima'' : (China)
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*''[[Lactuca flavissima]]'' : (China)
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*''Lactuca floridana'' : Florida Lettuce, Woodland Lettuce
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*''[[Lactuca floridana]]'' : Florida Lettuce, Woodland Lettuce
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*''Lactuca forrestii'' : (China)
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*''[[Lactuca forrestii]]'' : (China)
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*''Lactuca forsteniana '' : (Sulawesi)
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*''[[Lactuca forsteniana]]'' : (Sulawesi)
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*''Lactuca funebris'' : (China)
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*''[[Lactuca funebris]]'' : (China)
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*''Lactuca georgica'' : (Georgia, Caucasus)
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*''[[Lactuca georgica]]'' : (Georgia, Caucasus)
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*''Lactuca gilletii'' : (tropical Africa)
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*''[[Lactuca gilletii]]'' : (tropical Africa)
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*''Lactuca glabra'' : (China)
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*''[[Lactuca glabra]]'' : (China)
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*''Lactuca glandulifera '' : (tropical Africa)
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*''[[Lactuca glandulifera]]'' : (tropical Africa)
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*''Lactuca glareosa'' : (China)
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*''[[Lactuca glareosa]]'' : (China)
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*''Lactuca glauciifolia '' : (Iran)
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*''[[Lactuca glauciifolia]]'' : (Iran)
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*''Lactuca gombalana'' : (China)
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*''[[Lactuca gombalana]]'' : (China)
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*''Lactuca goraeensis'' : (tropical Africa)
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*''[[Lactuca goraeensis]]'' : (tropical Africa)
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*''Lactuca gracilipetiolata '' : (Myanmar)
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*''[[Lactuca gracilipetiolata]]'' : (Myanmar)
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*''Lactuca graeca'' : (Greece)
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*''[[Lactuca graeca]]'' : (Greece)
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*''Lactuca graminifolia'' : Grass-leaf Lettuce, Grassleaf Lettuce (SE USA)
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*''[[Lactuca graminifolia]]'' : Grass-leaf Lettuce, Grassleaf Lettuce (SE USA)
 
**''Lactuca graminifolia'' var. ''arizonica'' : (Arizona, Texas, New Mexico)
 
**''Lactuca graminifolia'' var. ''arizonica'' : (Arizona, Texas, New Mexico)
 
**''Lactuca graminifolia'' var. ''mexicana '' : (Mexico, Guatemala)
 
**''Lactuca graminifolia'' var. ''mexicana '' : (Mexico, Guatemala)
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*''Lactuca grandicolla '' : (Japan)
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*''[[Lactuca grandicolla]]'' : (Japan)
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*''Lactuca grenieri'' : (France)
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*''[[Lactuca grenieri]]'' : (France)
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*''Lactuca grosii'' : (Spain)
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*''[[Lactuca grosii]]'' : (Spain)
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*''Lactuca haimanniana'' : (North Africa)
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*''[[Lactuca haimanniana]]'' : (North Africa)
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*''Lactuca hallaisanensis'' ; (Korea)
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*''[[Lactuca hallaisanensis]]'' ; (Korea)
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*''Lactuca henryi'' : (China)
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*''[[Lactuca henryi]]'' : (China)
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*''Lactuca herbanica'' : (Canary Islands)
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*''[[Lactuca herbanica]]'' : (Canary Islands)
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*''Lactuca heyneana'' : (India)
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*''[[Lactuca heyneana]]'' : (India)
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*''Lactuca hirsuta'' : Hairy Lettuce (NE USA)
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*''[[Lactuca hirsuta]]'' : Hairy Lettuce (NE USA)
 
**''Lactuca hirsuta'' f. ''calvifolia'' : (NE USA)
 
**''Lactuca hirsuta'' f. ''calvifolia'' : (NE USA)
 
**''Lactuca hirsuta'' var. ''genuina''  
 
**''Lactuca hirsuta'' var. ''genuina''  
 
**''Lactuca hirsuta'' f. ''indivisa'' : (SE USA)
 
**''Lactuca hirsuta'' f. ''indivisa'' : (SE USA)
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*''Lactuca hispida'' : (Asia Minor)
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*''[[Lactuca hispida]]'' : (Asia Minor)
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*''Lactuca hoatiensis'' : (Korea)
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*''[[Lactuca hoatiensis]]'' : (Korea)
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*''Lactuca holophylla'' : (Nigeria)
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*''[[Lactuca holophylla]]'' : (Nigeria)
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*''Lactuca homblei '' : (Congo)
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*''[[Lactuca homblei]]'' : (Congo)
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*''Lactuca humilis'' : (Ethiopia)
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*''[[Lactuca humilis]]'' : (Ethiopia)
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*''Lactuca imbricata'' : (tropical Africa)
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*''[[Lactuca imbricata]]'' : (tropical Africa)
 
*''Lactuca'' × ''impura'' : (Morocco)
 
*''Lactuca'' × ''impura'' : (Morocco)
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*''Lactuca indica'' : Indian Lettuce
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*''[[Lactuca indica]]'' : Indian Lettuce
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*''Lactuca inermis'' : (Arabian peninsula)
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*''[[Lactuca inermis]]'' : (Arabian peninsula)
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*''Lactuca integra'' : (Philippines)
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*''[[Lactuca integra]]'' : (Philippines)
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*''Lactuca integrifolia'' : (North America)
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*''[[Lactuca integrifolia]]'' : (North America)
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*''Lactuca intricata'' : (Asia Minor)
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*''[[Lactuca intricata]]'' : (Asia Minor)
−
*''Lactuca intricatissima'' : (Afghanistan)
+
*''[[Lactuca intricatissima]]'' : (Afghanistan)
−
*''Lactuca intybacea'' : (Nicaragua)
+
*''[[Lactuca intybacea]]'' : (Nicaragua)
−
*''Lactuca jamaicensis'' : (Caribbean)
+
*''[[Lactuca jamaicensis]]'' : (Caribbean)
−
*''Lactuca japonica'' : (Japan)
+
*''[[Lactuca japonica]]'' : (Japan)
−
*''Lactuca kanitziana'' : (Borneo)
+
*''[[Lactuca kanitziana]]'' : (Borneo)
−
*''Lactuca kashmiriana'' : (India)
+
*''[[Lactuca kashmiriana]]'' : (India)
−
*''Lactuca kawaguchii'' : (Tibet)
+
*''[[Lactuca kawaguchii]]'' : (Tibet)
−
*''Lactuca keiskeana'' : (Japan)
+
*''[[Lactuca keiskeana]]'' : (Japan)
−
*''Lactuca kenyaensis'' : (Kenya)
+
*''[[Lactuca kenyaensis]]'' : (Kenya)
−
*''Lactuca khorasanica'' : (Iran)
+
*''[[Lactuca khorasanica]]'' : (Iran)
−
*''Lactuca klossii'' : (SE Asia)
+
*''[[Lactuca klossii]]'' : (SE Asia)
−
*''Lactuca koelzii'' : (Afghanistan)
+
*''[[Lactuca koelzii]]'' : (Afghanistan)
−
*''Lactuca kossinskyi'' : (Siberia)
+
*''[[Lactuca kossinskyi]]'' : (Siberia)
−
*''Lactuca kossmatii'' : (tropical Africa)
+
*''[[Lactuca kossmatii]]'' : (tropical Africa)
−
*''Lactuca kouyangensis'' : (China)
+
*''[[Lactuca kouyangensis]]'' : (China)
−
*''Lactuca lacerrima'' : (China)
+
*''[[Lactuca lacerrima]]'' : (China)
−
*''Lactuca lactucarii'' : (France)
+
*''[[Lactuca lactucarii]]'' : (France)
−
*''Lactuca lahulensis'' : (India)
+
*''[[Lactuca lahulensis]]'' : (India)
−
*''Lactuca lamii'' : (New Guinea)
+
*''[[Lactuca lamii]]'' : (New Guinea)
−
*''Lactuca lebrunii'' : (Congo)
+
*''[[Lactuca lebrunii]]'' : (Congo)
−
*''Lactuca leptocephala'' : (Congo)
+
*''[[Lactuca leptocephala]]'' : (Congo)
−
*''Lactuca lessertiana'' : (Himalaya)
+
*''[[Lactuca lessertiana]]'' : (Himalaya)
−
*''Lactuca leucoclada'' : (Afghanistan)
+
*''[[Lactuca leucoclada]]'' : (Afghanistan)
−
*''Lactuca longespicata'' : (Congo)
+
*''[[Lactuca longespicata]]'' : (Congo)
−
*''Lactuca lignea'' : (China)
+
*''[[Lactuca lignea]]'' : (China)
−
*''Lactuca longifolia'' : (Himalaya)
+
*''[[Lactuca longifolia]]'' : (Himalaya)
−
*''Lactuca longirostra'' : (Japan)
+
*''[[Lactuca longirostra]]'' : (Japan)
−
*''Lactuca ludoviciana'' : Biannual Lettuce, Louisiana Lettuce, Wild Lettuce (NW America)
+
*''[[Lactuca ludoviciana]]'' : Biannual Lettuce, Louisiana Lettuce, Wild Lettuce (NW America)
−
*''Lactuca luzonica'' : (Philippines)
+
*''[[Lactuca luzonica]]'' : (Philippines)
−
*''Lactuca macrophylla'' : (North America)
+
*''[[[[Lactuca macrophylla]]'' : (North America)
−
*''Lactuca macrorhiza'' : (Himalaya)
+
*''[[Lactuca macrorhiza]]'' : (Himalaya)
−
*''Lactuca macroseris'' : (tropical Africa)
+
*''[[Lactuca macroseris]]'' : (tropical Africa)
−
*''Lactuca maculata''  
+
*''[[Lactuca maculata]]''  
−
*''Lactuca malaissei'' : (Congo)
+
*''[[Lactuca malaissei]]'' : (Congo)
−
*''Lactuca maritima'' : (North America)
+
*''[[Lactuca maritima]]'' : (North America)
−
*''Lactuca marunguensis'' : (Congo)
+
*''[[Lactuca marunguensis]]'' : (Congo)
−
*''Lactuca massaviensis'' : (NE Africa, Arabia)
+
*''[[Lactuca massaviensis]]'' : (NE Africa, Arabia)
−
*''Lactuca matsumurae'' : (Japan)
+
*''[[Lactuca matsumurae]]'' : (Japan)
−
*''Lactuca microcephala'' : (Asia Minor)
+
*''[[Lactuca microcephala]]'' : (Asia Minor)
−
*''Lactuca microsperma'' : (New Guinea)
+
*''[[Lactuca microsperma]]'' : (New Guinea)
−
*''Lactuca morssii'' : Morss' Lettuce (NE USA)
+
*''[[Lactuca morssii]]'' : Morss' Lettuce (NE USA)
−
*''Lactuca mulgedioides'' : (Kurdistan)
+
*''[[Lactuca mulgedioides]]'' : (Kurdistan)
−
*''Lactuca mulsanti'' : (Spain)
+
*''[[Lactuca mulsanti]]'' : (Spain)
−
*''Lactuca multipes'' : (China)
+
*''[[Lactuca multipes]]'' : (China)
−
*''Lactuca muralis'' : (Europe)
+
*''[[Lactuca muralis]]'' : (Europe)
−
*''Lactuca mwinilungensis'' : (Zambia)
+
*''[[Lactuca mwinilungensis]]'' : (Zambia)
−
*''Lactuca nakaiana'' : (Korea)
+
*''[[Lactuca nakaiana]]'' : (Korea)
−
*''Lactuca nana'' : (tropical Africa)
+
*''[[Lactuca nana]]'' : (tropical Africa)
−
*''Lactuca napifera'' : (China)
+
*''[[Lactuca napifera]]'' : (China)
−
*''Lactuca numidica'' : (Algeria)
+
*''[[Lactuca numidica]]'' : (Algeria)
−
*''Lactuca nummularifolia'' : (Korea)
+
*''[[Lactuca nummularifolia]]'' : (Korea)
−
*''Lactuca nuristanica'' : (Afghanistan)
+
*''[[Lactuca nuristanica]]'' : (Afghanistan)
−
*''Lactuca oblongifolia'' : (North America)
+
*''[[Lactuca oblongifolia]]'' : (North America)
−
*''Lactuca orientalis'' : (Himalaya)
+
*''[[Lactuca orientalis]]'' : (Himalaya)
−
*''Lactuca ovatifolia'' : (North America)
+
*''[[Lactuca ovatifolia]]'' : (North America)
−
*''Lactuca pakistanica'' : (Pakistan)
+
*''[[Lactuca pakistanica]]'' : (Pakistan)
−
*''Lactuca pallidicoerulea'' : (South Africa)
+
*''[[Lactuca pallidicoerulea]]'' : (South Africa)
−
*''Lactuca palmensis'' : (Canary Islands)
+
*''[[Lactuca palmensis]]'' : (Canary Islands)
−
*''Lactuca paradoxa'' : (Ethiopia)
+
*''[[Lactuca paradoxa]]'' : (Ethiopia)
−
*''Lactuca parishii'' : (Thailand)
+
*''[[Lactuca parishii]]'' : (Thailand)
−
*''Lactuca paulayana'' : (Socotra)
+
*''[[Lactuca paulayana]]'' : (Socotra)
−
*''Lactuca perennis'' : (Southern Europe)
+
*''[[Lactuca perennis]]'' : (Southern Europe)
−
*''Lactuca persica'' : (Iran)
+
*''[[Lactuca persica]]'' : (Iran)
−
*''Lactuca petrensis'' : (tropical Africa)
+
*''[[Lactuca petrensis]]'' : (tropical Africa)
−
*''Lactuca picridiformis'' : (Pakistan)
+
*''[[Lactuca picridiformis]]'' : (Pakistan)
−
*''Lactuca pilosa'' : (North America)
+
*''[[Lactuca pilosa]]'' : (North America)
−
*''Lactuca plumieri'' : (France)
+
*''[[Lactuca plumieri]]'' : (France)
−
*''Lactuca polycephala'' : (India, Myanmar)
+
*''[[Lactuca polycephala]]'' : (India, Myanmar)
−
*''Lactuca polyclada'' : (Iran)
+
*''[[Lactuca polyclada]]'' : (Iran)
−
*''Lactuca polyphylla'' : (NW USA)
+
*''[[Lactuca polyphylla]]'' : (NW USA)
−
*''Lactuca praecox'' : (Zimbabwe)
+
*''[[Lactuca praecox]]'' : (Zimbabwe)
−
*''Lactuca prattii'' : (China)
+
*''[[Lactuca prattii]]'' : (China)
−
*''Lactuca procera''  
+
*''[[Lactuca procera]]''  
−
*''Lactuca procumbens'' : (India)
+
*''[[Lactuca procumbens]]'' : (India)
−
*''Lactuca prolixa'' : (New Guinea)
+
*''[[Lactuca prolixa]]'' : (New Guinea)
−
*''Lactuca pseudo-sonchus'' : (China)
+
*''[[Lactuca pseudo-sonchus]]'' : (China)
−
*''Lactuca pseudoumbrella'' : (Himalaya)
+
*''[[Lactuca pseudoumbrella]]'' : (Himalaya)
−
*''Lactuca pulchella'' (NW America)
+
*''[[Lactuca pulchella]]'' (NW America)
−
*''Lactuca pumila'' : (Afghanistan)
+
*''[[Lactuca pumila]]'' : (Afghanistan)
−
*''Lactuca pygmaea'' : (Java)
+
*''[[Lactuca pygmaea]]'' : (Java)
−
*''Lactuca pyrenaica''  
+
*''[[Lactuca pyrenaica]]''  
−
*''Lactuca quercina'' : (Southern Europa, Caucasus)
+
*''[[Lactuca quercina]]'' : (Southern Europa, Caucasus)
−
*''Lactuca quercus'' : (Korea)
+
*''[[Lactuca quercus]]'' : (Korea)
−
*''Lactuca querna'' : (Caspian Sea)
+
*''[[Lactuca querna]]'' : (Caspian Sea)
−
*''Lactuca racemosa'' : (Armenia)
+
*''[[Lactuca racemosa]]'' : (Armenia)
−
*''Lactuca raddiana'' : (Japan)
+
*''[[Lactuca raddiana]]'' : (Japan)
−
*''Lactuca ramosissima'' : (France)
+
*''[[Lactuca ramosissima]]'' : (France)
−
*''Lactuca rapunculoides'' : (Himalaya)
+
*''[[Lactuca rapunculoides]]'' : (Himalaya)
−
*''Lactuca rariflora'' : (Ethiopia)
+
*''[[Lactuca rariflora]]'' : (Ethiopia)
−
*''Lactuca repens'' : (Japan)
+
*''[[Lactuca repens]]'' : (Japan)
−
*''Lactuca retrorsidens'' : (Borneo)
+
*''[[Lactuca retrorsidens]]'' : (Borneo)
−
*''Lactuca reviersiana'' : (Morocco)
+
*''[[Lactuca reviersiana]]'' : (Morocco)
−
*''Lactuca reviersii'' : (Morocco)
+
*''[[Lactuca reviersii]]'' : (Morocco)
−
*''Lactuca riparia'' : (Thailand)
+
*''[[Lactuca riparia]]'' : (Thailand)
−
*''Lactuca rogersii'' : (Madagascar)
+
*''[[Lactuca rogersii]]'' : (Madagascar)
−
*''Lactuca rosularis'' : (Iran)
+
*''[[Lactuca rosularis]]'' : (Iran)
−
*''Lactuca rubrolutea'' : (China)
+
*''[[Lactuca rubrolutea]]'' : (China)
−
*''Lactuca sagittata'' : (Southern Europe, Asia Minor)
+
*''[[Lactuca sagittata]]'' : (Southern Europe, Asia Minor)
−
*''Lactuca salehensis'' : (tropical Africa)
+
*''[[Lactuca salehensis]]'' : (tropical Africa)
−
*''Lactuca saligna'' : Willow-leaf Lettuce, Willowleaf Lettuce (Europe, North Africa, Asia Minor)
+
*''[[Lactuca saligna]]'' : Willow-leaf Lettuce, Willowleaf Lettuce (Europe, North Africa, Asia Minor)
−
*''Lactuca sanguinea''
+
*''[[Lactuca sanguinea]]''
−
*''Lactuca sassandrensis'' : (Ivory Coast)
+
*''[[Lactuca sassandrensis]]'' : (Ivory Coast)
 
*''[[Lactuca sativa]]'' : Garden Lettuce, Lettuce
 
*''[[Lactuca sativa]]'' : Garden Lettuce, Lettuce
−
*''Lactuca scandens'' : (China)
+
*''[[Lactuca scandens]]'' : (China)
−
*''Lactuca scariola'' : (Europe)
+
*''[[[[Lactuca scariola]]'' : (Europe)
−
*''Lactuca scarioloides'' : (Iran)
+
*''[[Lactuca scarioloides]]'' : (Iran)
−
*''Lactuca schulzeana'' : (Angola)
+
*''[[Lactuca schulzeana]]'' : (Angola)
−
*''Lactuca schweinfurthii'' : (tropical Africa)
+
*''[[Lactuca schweinfurthii]]'' : (tropical Africa)
−
*''Lactuca scoparia '' : (Afghanistan)
+
*''[[Lactuca scoparia]]'' : (Afghanistan)
−
*''Lactuca semibarbata '' : (Congo)
+
*''[[Lactuca semibarbata]]'' : (Congo)
−
*''Lactuca senecio'' : (Korea)
+
*''[[Lactuca senecio]]'' : (Korea)
−
*''Lactuca sereti'' : (tropical Africa)
+
[[Image:Kropsla vruchten (Lactuca sativa fruits).jpg|thumb|right|250px|fruits of cultivated lettuce ''L. sativa'']]
−
*''Lactuca serratifolia'' : (Spain)
+
*''[[Lactuca sereti]]'' : (tropical Africa)
 +
*''[[Lactuca serratifolia]]'' : (Spain)
 
*''[[Lactuca serriola]]'' : Prickly Lettuce, China Lettuce, Wild Lettuce (Southern Europe)
 
*''[[Lactuca serriola]]'' : Prickly Lettuce, China Lettuce, Wild Lettuce (Southern Europe)
−
*''Lactuca seticuspis'' : (Syria)
+
*''[[Lactuca seticuspis]]'' : (Syria)
−
*''Lactuca setosa'' : (tropical Africa)
+
*''[[Lactuca setosa]]'' : (tropical Africa)
−
*''Lactuca sibirica'' : (Siberia)
+
*''[[Lactuca sibirica]]'' : (Siberia)
−
*''Lactuca sonchifolia'' : (Europe)
+
*''[[Lactuca sonchifolia]]'' : (Europe)
−
*''Lactuca sonchoides'' : (Asia Minor)
+
*''[[Lactuca sonchoides]]'' : (Asia Minor)
−
*''Lactuca songeensis'' : (Tanzania)
+
*''[[Lactuca songeensis]]'' : (Tanzania)
−
*''Lactuca soongarica''  
+
*''[[Lactuca soongarica]]''  
−
*''Lactuca souliei'' : (China)
+
*''[[Lactuca souliei]]'' : (China)
−
*''Lactuca spicata''
+
*''[[Lactuca spicata]]''
−
*''Lactuca spinidens'' : (Siberia)
+
*''[[Lactuca spinidens]]'' : (Siberia)
−
*''Lactuca stebbinsii '' : (Angola)
+
*''[[Lactuca stebbinsii]]'' : (Angola)
−
*''Lactuca steelei'' : (North America)
+
*''[[Lactuca steelei]]'' : (North America)
−
*''Lactuca stenocephala '' : (Nigeria)
+
*''[[Lactuca stenocephala]]'' : (Nigeria)
−
*''Lactuca stipulata '' : (Congo)  
+
*''[[Lactuca stipulata]]'' : (Congo)  
−
*''Lactuca stolonifera '' : (Japan)
+
*''[[Lactuca stolonifera]]'' : (Japan)
−
*''Lactuca sylvatica'' : (NW USA)
+
*''[[Lactuca sylvatica]]'' : (NW USA)
−
*''Lactuca taitoensis'' : (China)
+
*''[[Lactuca taitoensis]]'' : (China)
−
*''Lactuca taliiensis'' : (China)
+
*''[[Lactuca taliiensis]]'' : (China)
−
*''Lactuca taquetii'' : (Korea)
+
*''[[Lactuca taquetii]]'' : (Korea)
−
*''Lactuca taraxacifolia'' : (tropical Africa)
+
*''[[Lactuca taraxacifolia]]'' : (tropical Africa)
−
*''Lactuca taraxacum'' : (Korea)
+
*''[[Lactuca taraxacum]]'' : (Korea)
 
*''[[Lactuca tatarica]]'' : Blue Lettuce, Chickory Lettuce, Russian Blue Lettuce (Asia, India)
 
*''[[Lactuca tatarica]]'' : Blue Lettuce, Chickory Lettuce, Russian Blue Lettuce (Asia, India)
−
*''Lactuca tenerrima'' : (Southern Europe, Morocco)
+
*''[[Lactuca tenerrima]]'' : (Southern Europe, Morocco)
−
*''Lactuca terrae-novae'' : Newfoundland Lettuce (Newfoundland)
+
*''[[Lactuca terrae-novae]]'' : Newfoundland Lettuce (Newfoundland)
−
*''Lactuca tetrantha'' : (Cyprus)
+
*''[[Lactuca tetrantha]]'' : (Cyprus)
−
*''Lactuca thibetica'' : (China)
+
*''[[Lactuca thibetica]]'' : (China)
−
*''Lactuca thirionni'' : (China)
+
*''[[Lactuca thirionni]]'' : (China)
−
*''Lactuca thunbergii'' : (Japan)
+
*''[[Lactuca thunbergii]]'' : (Japan)
−
*''Lactuca tinctociliata'' : (Angola)
+
*''[[Lactuca tinctociliata]]'' : (Angola)
−
*''Lactuca tricostata'' : (tropical Africa)
+
*''[[Lactuca tricostata]]'' : (tropical Africa)
−
*''Lactuca trifida'' : (China)
+
*''[[Lactuca trifida]]'' : (China)
−
*''Lactuca triquetra'' : (Syria)
+
*''[[Lactuca triquetra]]'' : (Syria)
−
*''Lactuca tsarongensis'' : (Tibet)
+
*''[[Lactuca tsarongensis]]'' : (Tibet)
−
*''Lactuca tuberosa'' : (Guinea)
+
*''[[Lactuca tuberosa]]'' : (Guinea)
−
*''Lactuca ugandensis'' : (Congo, Uganda)
+
*''[[Lactuca ugandensis]]'' : (Congo, Uganda)
−
*''Lactuca umbellata'' : (New Guinea)
+
*''[[Lactuca umbellata]]'' : (New Guinea)
−
*''Lactuca undulata'' var. ''albicaulis '' : (China)
+
*''[[Lactuca undulata]]'' var. ''albicaulis '' : (China)
−
*''Lactuca vanderysti'' : (Congo)
+
*''[[Lactuca vanderysti]]'' : (Congo)
−
*''Lactuca vanensis'' : (Armenia)
+
*''[[Lactuca vanensis]]'' : (Armenia)
−
*''Lactuca vaniotii'' : (Korea)
+
*''[[Lactuca vaniotii]]''  
−
*''Lactuca varianii'' : (Angola)
+
*''[[Lactuca varianii]]''  
−
*''Lactuca verdickii'' : (tropical Africa)
+
*''[[Lactuca verdickii]]''  
−
*''Lactuca villosa''
+
*''[[Lactuca villosa]]''
−
*''Lactuca viminea'': (Mediterranean)
+
*''[[Lactuca viminea]]''
 
*''[[Lactuca virosa]]'': Wild Lettuce, Bitter Lettuce (Europe)
 
*''[[Lactuca virosa]]'': Wild Lettuce, Bitter Lettuce (Europe)
−
*''[[Lactuca visianii]]'' : (Europe)
+
*''[[Lactuca visianii]]''
−
*''[[Lactuca wallichiana]]'' : (Afghanistan, Nepal)
+
*''[[Lactuca wallichiana]]''
−
*''[[Lactuca watsoniana]]'' : (Azores)
+
*''[[Lactuca watsoniana]]''  
−
*''[[Lactuca welwitschii]]'' : (Madagascar, Angola)
+
*''[[Lactuca welwitschii]]''
−
*''[[Lactuca wilhelmsiana]]'' : (Armenia)
+
*''[[Lactuca wilhelmsiana]]''
−
*''[[Lactuca yemensis]]'' : (Arabian peninsula)
+
*''[[Lactuca yemensis]]''  
−
*''[[Lactuca zambeziaca]]'' : (Angola, Zambia)
+
*''[[Lactuca zambeziaca]]''
 +
 
 +
==Gallery==
 +
{{photo-sources}}<!-- remove this line if there are already 3 or more photos in the gallery  -->
 +
 
 +
<gallery>
 +
Image:Lactucaserriola2web.jpg|Prickly Lettuce (''Lactuca serriola'')  
 +
Image:Lactuca-virosa.jpg|Wild Lettuce (''[[Lactuca virosa]]'')
 +
Image:Upload.png| photo 3
 +
</gallery>
 +
 
 +
==References==
 +
*[[Standard Cyclopedia of Horticulture]], by L. H. Bailey, MacMillan Co., 1963
 +
<!--- xxxxx  *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381  -->
 +
<!--- xxxxx  *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432  -->
 +
<!--- xxxxx  *Sunset National Garden Book. Sunset Books, Inc., 1997. ISBN 0376038608  -->
 +
 
 +
==External links==
 +
*{{wplink}}
 +
 
 +
{{stub}}
 +
[[Category:Categorize]]
  
−
[[Category:Asteraceae]]
+
<!--  in order to add all the proper categories, go to http://www.plants.am/wiki/Plant_Categories and copy/paste the contents of the page here, and then follow the easy instructions!    -->

Latest revision as of 16:31, 30 June 2009


Lactuca tuberosa


Plant Characteristics
Origin: ✈ ?
Cultivation
Exposure: ☼ ?"?" is not in the list (sun, part-sun, shade, unknown) of allowed values for the "Exposure" property.
Water: ◍ ?"?" is not in the list (wet, moist, moderate, dry, less when dormant) of allowed values for the "Water" property.
Scientific Names

Asteraceae >

Lactuca >



Read about Lactuca in the Standard Cyclopedia of Horticulture 

Lactuca (from the old Latin name lac; referring to the milky juice). Compositae. Lettuce. A well-known group of hardy annual or perennial herbs, mostly native of the northern hemisphere.

Plants 2-4 or more feet high, with alternate, variously shaped lvs. and small-panicled heads of yellow, white or blue fls.: involucre cylindric, its bracts imbricated in several series; receptacle flat, naked; rays cut off even at apex, and 5-toothed. — More than 200 specific names have been given to the genus, probably half of which are synonyms with but only 8 or 9 known in cult., and these are doubtless forms of but 2 or 3 species. Aside from garden lettuce, only 1 species appears to be in the trade, though wild plants of other species are often gathered for medicinal purposes. All of the species possess narcotic and sedative properties, the sedative known as lactucarium, or lettuce-opium, being obtained principally from the European species, L. virosa. Lettuce has been known and used as a salad from a very remote period. It is said to have been served at the tables of Persian kings 400 B. C. See Lettuce.

Lactuca sativa, Lettuce. An annual plant, not known in the wild state but generally supposed to have originated from L. Scariola,Linn., in Asia. There are many garden forms assuming an endless variety of forms but which may be divided into 4 rather distinct types.

Var. capitata (L. capitata). Common Cabbage Lettuce. Lvs. entire or sparingly dentate, broad, rounded, yellowish or brownish green, more or less wrinkled and in some garden varieties much curled, spreading, 6-14 in., usually quite compact.

Var. intybacea (L. intybacea, L. quercina). Cut-leaved Lettuce. Lvs. 6-10 in. long, deeply and irregularly cut on the edges, loosely spreading.

Var. romana, Cos Lettuce. One to 2 ft. high: lvs. entire or sparingly dentate, much longer than broad, quite erect, forming a cylindrical or conical- shaped plant.

Lactuca var. angustanam (L. angustana). Lvs. 1-2 in. wide, 6-12 in. long, entire, slightly spreading in habit.

Lactuca plumieri. & Godr. St. about 6 ft., stout: lvs. much cut, broadly oblong, bluish on the under side: fl.-heads terminal, corymbose, the rays purple. S. France. June-Aug.

Lactuca Bourgaei (Boiss.) , is a thick-stemmed bristly-lvd. perennial often 6 ft. tall: heads small, with pinkish bracts and lilac rays. Medit. region. — L. canadensia, Linn. Biennial or annual 4-9 ft. high: lvs. entire or nearly so. Wild plants often gathered for salad.— L. perennis, Linn. Root perennial, 2-3 ft. high: Ivs. 8-10 in. long, deeply cut: fls. large, light blue. Native of Eu. — L. Scariola. Linn. Prickly Lettuce. Annual or biennial, sometimes 6 ft. high, the st. stiff and often paniculately branched: lvs. 1-2 in. wide, 4-6 in. long: fls. yellow, inconspicuous. Intro, from Old World, and now a widely distributed weed.


The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.


Cultivation

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Propagation

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Pests and diseases

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Species

fruits of cultivated lettuce L. sativa

Gallery

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  • Prickly Lettuce (Lactuca serriola)

  • Wild Lettuce (Lactuca virosa)

  • photo 3

References

External links


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