Difference between revisions of "Picea pungens"

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| common_names =     <!--- if multiple, list all, if none, leave blank -->
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|genus=Picea
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| growth_habit = ?  <!--- tree, shrub, herbaceous, vine, etc -->
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|species=pungens
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| high = ?  <!--- 1m (3 ft) -->
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|common_name=Colorado Blue Spruce, Blue Spruce
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| wide =     <!--- 65cm (25 inches) -->
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|name_ref=Wikipedia
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| origin = ?  <!--- Mexico, S America, S Europe, garden, etc -->
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|habit=tree
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| poisonous =     <!--- indicate parts of plants which are known/thought to be poisonous -->
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|habit_ref=Complete Landscaping - ISBN 9780376009272
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| lifespan =     <!--- perennial, annual, etc -->
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|Min ht box=30
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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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|Max ht box=60
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| features =     <!--- flowers, fragrance, fruit, naturalizes, invasive -->
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|height_ref=Complete Landscaping - ISBN 9780376009272
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|lifespan=perennial
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|life_ref=Complete Landscaping - ISBN 9780376009272
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| sunset_zones =     <!--- eg. 8, 9, 12-24, not available -->
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|exposure=sun
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|water=moist, moderate
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| image_width = 240px    <!--- leave as 240px if horizontal orientation photo, or change to 180px if vertical -->
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|features=evergreen, foliage
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|image=Picea pungens tree.jpg
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'''''Picea pungens''''' ('''Colorado Blue Spruce''' or '''Blue Spruce''') is a species of [[spruce]] native to western [[North America]], from southeast [[Idaho]] and southwest [[Wyoming]], south through [[Utah]] and [[Colorado]] to [[Arizona]] and [[New Mexico]]. It grows at high altitudes from {{convert|1750|-|3000|m|abbr=on}} altitude, though unlike [[Engelmann Spruce]] in the same area, it does not reach the [[tree-line|alpine tree-line]]. It is most commonly found growing along stream sides in mountain valleys, where moisture levels in the soil are greater than the often low rainfall in the area would suggest.<ref name="farjon">{{cite book
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|last = Farjon
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|first = Aljos
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|year = 1990
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|title = Pinaceae: Drawings and Descriptions of the Genera
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|volume = 121
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|series = Koeltz Scientific Books
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|location = [[Koenigstein]], [[Germany]]
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|isbn = 3-87429-298-3}}</ref><ref name="fna">{{cite web
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|url = http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=233500912
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|title = Flora of North America: Picea pungens
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|work = Efloras.org
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|publisher = [[Missouri Botanical Garden]]
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|accessdate = 2010-05-26}}</ref><ref name="iucn">{{IUCN2009.2|assessors=Conifer Specialist Group|year=1998|id=42333|title=Picea pungens|downloaded=26 May 2010}}</ref>
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Blue spruce is a medium-sized [[evergreen]] [[tree]] growing to {{convert|25|–|30|m|abbr=on}} tall, exceptionally to {{convert|46|m|abbr=on}} tall, and with a trunk diameter of up to {{convert|1.5|m|abbr=on}}. The [[bark]] is thin and gray, with narrow vertical furrows. The crown is conic in young trees, becoming cylindric in older trees. The shoots are stout, orange-brown, usually glabrous, and with prominent pulvini.
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The [[leaf|leaves]] are needle-like, {{convert|15|–|30|mm}} long, stout, rhombic in cross-section, dull gray-green to bright glaucous blue (very variable from tree to tree in wild populations), with several lines of [[stomata]]; the tip is viciously sharp.<ref name="farjon" /><ref name="fna" /><ref name="gd">{{cite web
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|url = http://www.conifers.org/pi/pic/pungens.htm
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|title = Picea pungens
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|editor = Christopher J. Earle
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|publisher = Gymnosperm Database
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|date = June 23, 2009
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|accessdate = 2010-05-26}}</ref>
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The [[conifer cone|cones]] are pendulous, slender cylindrical, {{convert|6|–|11|cm|abbr=on}} long and {{convert|2|cm|abbr=on}} broad when closed, opening to {{convert|4|cm|abbr=on}} broad. They have thin, flexible scales {{convert|20|–|24|mm|abbr=on}} long, with a wavy margin. They are reddish to violet, maturing pale brown 5–7 months after pollination. The [[seed]]s are black, {{convert|3|–|4|mm|abbr=on}} long, with a slender, {{convert|10|–|13|mm|abbr=on}} long pale brown wing.<ref name="farjon" /><ref name="fna" />
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Picea pungens, Engelm. (P. Parryana, Sarg. Abies Menziesii, Engelm., not Lindl.). Colorado Spruce. Tree, 80-100, or occasionally to 150 ft., with horizontal stout branches in rather remote whorls, forming a broad, regular pyramid: winter buds with brownish yellow usually reflexed scales: young branches glabrous, bright yellowish brown: lvs. rigid, incurved, spiny -acuminate, bluish green to silvery white or rarely dull green, 3/4 - 1 1/5  in long with 2 resin canals: cones cylindric oblong, light brown and glossy, 2 1/2 - 4 in. long; scales rhomboidal, narrowed and erose at the apex. Wyo. to Colo, and Utah. A very handsome and very hardy tree of symmetrical habit, with light, sometimes almost silvery white foliage. According to the different shades of color of the foliage, the following varieties are distinguished: Var. glauca, Beissn. With bluish green lvs. Var. caerulea, Beissn. With bluish white foliage. Var. argentea, Beissn. With silvery white foliage. Var. Kosteri, Beissn. With silvery white foliage and of very regular pyramidal habit. Var. glauca pendula, Beissn. With bluish foliage and pendulous branches. Var. viridis, Regel (P. commutata, Hort.). is the form with green lvs. Var. compacta, Rehd. A dwarf compact form; originated at the Arnold Arboretum. Var. aurea, Niemetz. With golden yellow foliage. Var. flavescens, Niemetz. With whitish yellow foliage. Var. Moerheimii, Rujis. Grows more compact and foliage deeper blue.
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Picea pungens, Engelm. (P. Parryana, Sarg. Abies Menziesii, Engelm., not Lindl.). Colorado Spruce. Fig. 2943. Tree, 80-100, or occasionally to 150 ft., with horizontal stout branches in rather remote whorls, forming a broad, regular pyramid: winter buds with brownish yellow usually reflexed scales: young branches glabrous, bright yellowish brown: lvs. rigid, incurved, spiny -acuminate, bluish green to silvery white or rarely dull green, 3/4 - 1 1/5  in long with 2 resin canals: cones cylindric-oblong, light brown and glossy, 2 1/2 - 4 in. long; scales  
 
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rhomboidal, narrowed and erose at the apex. Wyo. to Colo, and Utah. S.S. 12:600. G.C. II. 20:725; III. 10:547. Mn. 7, p. 51. Gng. 7:49. S.H. 2:273. F. 1884, p. 5. G.M.40:35.  A very handsome and very hardy tree of symmetrical habit, with light, sometimes almost silvery white foliage. According to the different shades of color of the foliage, the following varieties are distinguished: Var. glauca, Beissn. With bluish green lvs. Gn. 63, p. 280. G.M. 50: 121. Gn. M. 2:26. G.W. 1, p. 355; 14, p.14. R.B. 32, p. 106. Var. caerulea, Beissn. With bluish white foliage. G.W. 1, p. 357. Var. argentea, Beissn. With silvery white foliage. Gt. 53, p. 493. G.W. 2, p. 295; 8, p. 481; 10, p. 48. M.D.G. 1901:178. Var. Kosteri, Beissn. With silvery white foliage and of very regular pyramidal habit. G.W. 15, p. 467. F.E. 16:461; 18: 82. Var. glauca  
 
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pendula, Beissn. With bluish foliage and pendulous branches. R.H. 1901, p. 183. F.E. 32:1173. G.W. 6, p. 399; 9, p. 543; 16, p. 79. M.D.G. 1901:133. Var. viridis, Regel (P. commutata, Hort.). is the form with green lvs. Var. compacta, Rehd. A dwarf compact form; originated at  
 
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the Arnold Arboretum. Var. aurea, Niemetz. With golden yellow foliage. Var. flavescens, Niemetz. With whitish yellow foliage. Var. Moerheimii, Rujis. Grows more compact and foliage deeper blue.
 
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Revision as of 21:47, 30 May 2011


Foliage and young cones


Plant Characteristics
Habit   tree

Height: ⇕ 30 ft"ft" can not be assigned to a declared number type with value 30. to 60 ft"ft" can not be assigned to a declared number type with value 60.
Lifespan: ⌛ perennial
Cultivation
Exposure: ☼ sun
Water: ◍ moist, moderate
Features: ✓ evergreen, foliage
USDA Zones: 3 to 7.5
Scientific Names

Pinaceae >

Picea >

pungens >


Picea pungens (Colorado Blue Spruce or Blue Spruce) is a species of spruce native to western North America, from southeast Idaho and southwest Wyoming, south through Utah and Colorado to Arizona and New Mexico. It grows at high altitudes from 1750 - 3000 m altitude, though unlike Engelmann Spruce in the same area, it does not reach the alpine tree-line. It is most commonly found growing along stream sides in mountain valleys, where moisture levels in the soil are greater than the often low rainfall in the area would suggest.[1][2][3]

Blue spruce is a medium-sized evergreen tree growing to 25 – 30 m tall, exceptionally to 46 m tall, and with a trunk diameter of up to 1.5 m . The bark is thin and gray, with narrow vertical furrows. The crown is conic in young trees, becoming cylindric in older trees. The shoots are stout, orange-brown, usually glabrous, and with prominent pulvini.

The leaves are needle-like, 15 – 30 mm long, stout, rhombic in cross-section, dull gray-green to bright glaucous blue (very variable from tree to tree in wild populations), with several lines of stomata; the tip is viciously sharp.[1][2][4]

The cones are pendulous, slender cylindrical, 6 – 11 cm long and 2 cm broad when closed, opening to 4 cm broad. They have thin, flexible scales 20 – 24 mm long, with a wavy margin. They are reddish to violet, maturing pale brown 5–7 months after pollination. The seeds are black, 3 – 4 mm long, with a slender, 10 – 13 mm long pale brown wing.[1][2]


Read about Picea pungens in the Standard Cyclopedia of Horticulture 

Picea pungens, Engelm. (P. Parryana, Sarg. Abies Menziesii, Engelm., not Lindl.). Colorado Spruce. Tree, 80-100, or occasionally to 150 ft., with horizontal stout branches in rather remote whorls, forming a broad, regular pyramid: winter buds with brownish yellow usually reflexed scales: young branches glabrous, bright yellowish brown: lvs. rigid, incurved, spiny -acuminate, bluish green to silvery white or rarely dull green, 3/4 - 1 1/5 in long with 2 resin canals: cones cylindric oblong, light brown and glossy, 2 1/2 - 4 in. long; scales rhomboidal, narrowed and erose at the apex. Wyo. to Colo, and Utah. A very handsome and very hardy tree of symmetrical habit, with light, sometimes almost silvery white foliage. According to the different shades of color of the foliage, the following varieties are distinguished: Var. glauca, Beissn. With bluish green lvs. Var. caerulea, Beissn. With bluish white foliage. Var. argentea, Beissn. With silvery white foliage. Var. Kosteri, Beissn. With silvery white foliage and of very regular pyramidal habit. Var. glauca pendula, Beissn. With bluish foliage and pendulous branches. Var. viridis, Regel (P. commutata, Hort.). is the form with green lvs. Var. compacta, Rehd. A dwarf compact form; originated at the Arnold Arboretum. Var. aurea, Niemetz. With golden yellow foliage. Var. flavescens, Niemetz. With whitish yellow foliage. Var. Moerheimii, Rujis. Grows more compact and foliage deeper blue. CH


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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Pests and diseases

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Species

Gallery

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  • Mature cone

  • Immature cone

  • photo 1

  • photo 2

  • photo 3

References

External links


  1. ↑ 1.0 1.1 1.2 Farjon, Aljos (1990). Pinaceae: Drawings and Descriptions of the Genera. Koeltz Scientific Books. 121. Koenigstein, Germany. ISBN 3-87429-298-3. 
  2. ↑ 2.0 2.1 2.2 "Flora of North America: Picea pungens". Efloras.org. Missouri Botanical Garden. Retrieved on 2010-05-26.
  3. ↑ Template:IUCN2009.2
  4. ↑ Christopher J. Earle:"Picea pungens". Gymnosperm Database (June 23, 2009). Retrieved on 2010-05-26.
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