Difference between revisions of "Tsuga sieboldii"

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|common_name=Southern Japanese Hemlock
 
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'''''Tsuga sieboldii''''', also called the '''Southern Japanese Hemlock''', or in [[Japanese (language)|Japanese]], simply '''Tsuga''', is a [[conifer]] native to the [[Japan|Japanese]] islands. In [[Europe]] and [[North America]] the tree is sometimes used as an ornamental and has been in cultivation since 1861.
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The tree is often multiple-stemmed from the base and the dense crown is broadly conical and pointed. The [[bark]] is a dark pink-grey in colour. It is smooth with horizontal folds when the tree is young, but later cracks into squares and become flaky. The glabrous [[shoot]]s are a pale shining buff, but they may vary to white or pale brown. The base of the [[petiole (botany)|petiole]] is red-brown. The [[leaf|leaves]] are densely set in irregular flat rows. They are broad and stubby in comparison to other species of the genus ''[[Tsuga]]'', and they vary in length from 0.7 cm to 2 cm long by about 0.2 cm wide. They are blunt with notched tips and shiny dark green above. The underside of the leaves has two broad, dull white [[stomata|stomatal]] bands. The [[buds]] are narrow based and ovoid, dark orange in colour. Their scales are convex.<ref name="Mitchell">{{cite book
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  | last =Mitchell
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  | first =Alan
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| wide =    <!--- 65cm (25 inches) -->
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  | authorlink =Alan Mitchell
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| origin = ?  <!--- Mexico, S America, S Europe, garden, etc -->
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  | title =Trees of Britain & Northern Europe
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  | publisher =Harper Collins Publishers
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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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   | date =1974
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| water = ?   <!--- frequent, regular, moderate, drought tolerant, let dry then soak -->
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  | location =London
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| features =     <!--- flowers, fragrance, fruit, naturalizes, invasive -->
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   | pages = 146
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  | id =ISBN 0-00-219213-6  }}</ref>  
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The stamenate (i.e. male) [[flower]]s are terminal on weak shoots. They are very small at only 2 mm, globular in shape and cherry-red in colour. The pistillate flowers are slightly larger at 5 mm, purple in colour and nodding ovoid in shape. The deep dark brown [[conifer cone|cone]]s are pendulous and ovoid-conic in shape. The tips are blunt and they measure about 2.3 cm long by 1.3 cm wide. Their scales are flat topped. <ref name="Mitchell"/>
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Tsuga sieboldii, Carr. (T. Araragi, Koehne). Tree, attaining 100 ft., with spreading slender branches: branchlets pale yellowish brown, somewhat glossy, glabrous, with reddish lf.-cushions: lvs. linear, usually broadest at the apex, emarginate, grooved and glossy dark green above, with 2 whitish lines beneath, 1/4 – 3/4 in. long: cone ovate, 1 – 1 1/4 in. long, the peduncle exceeding the bud-scales: bracts bifid. Japan.
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Tsuga sieboldii, Carr. (T. Araragi, Koehne). Fig. 3858. Tree, attaining 100 ft., with spreading slender branches: branchlets pale yellowish brown, somewhat glossy, glabrous, with reddish lf.-cushions: lvs. linear, usually broadest at the apex, emarginate, grooved and glossy dark green above, with 2 whitish lines beneath, 1/4 – 3/4 in. long: cone ovate, 1 – 1 1/4 in. long, the peduncle exceeding the bud-scales: bracts bifid. Japan. G.F. 10:492 (adapted in Fig. 3858). F.E. 32:1301. S.I.F. 2:4.
 
 
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==Gallery==
 
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File:Tsuga-sieboldii-foliage.jpg
 
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Latest revision as of 16:06, 4 May 2010


Tsuga-sieboldii-habit.jpg


Plant Characteristics
Habit   tree

Height: ⇕ 50 ft"ft" can not be assigned to a declared number type with value 50. to 100 ft"ft" can not be assigned to a declared number type with value 100.
Width: ⇔ 25 ft"ft" can not be assigned to a declared number type with value 25.
Lifespan: ⌛ perennial
Cultivation
Exposure: ☼ sun
USDA Zones: 6 to 10
Scientific Names

Pinaceae >

Tsuga >

sieboldii >


Tsuga sieboldii, also called the Southern Japanese Hemlock, or in Japanese, simply Tsuga, is a conifer native to the Japanese islands. In Europe and North America the tree is sometimes used as an ornamental and has been in cultivation since 1861.

The tree is often multiple-stemmed from the base and the dense crown is broadly conical and pointed. The bark is a dark pink-grey in colour. It is smooth with horizontal folds when the tree is young, but later cracks into squares and become flaky. The glabrous shoots are a pale shining buff, but they may vary to white or pale brown. The base of the petiole is red-brown. The leaves are densely set in irregular flat rows. They are broad and stubby in comparison to other species of the genus Tsuga, and they vary in length from 0.7 cm to 2 cm long by about 0.2 cm wide. They are blunt with notched tips and shiny dark green above. The underside of the leaves has two broad, dull white stomatal bands. The buds are narrow based and ovoid, dark orange in colour. Their scales are convex.[1]

The stamenate (i.e. male) flowers are terminal on weak shoots. They are very small at only 2 mm, globular in shape and cherry-red in colour. The pistillate flowers are slightly larger at 5 mm, purple in colour and nodding ovoid in shape. The deep dark brown cones are pendulous and ovoid-conic in shape. The tips are blunt and they measure about 2.3 cm long by 1.3 cm wide. Their scales are flat topped. [1]


Read about Tsuga sieboldii in the Standard Cyclopedia of Horticulture 

Tsuga sieboldii, Carr. (T. Araragi, Koehne). Tree, attaining 100 ft., with spreading slender branches: branchlets pale yellowish brown, somewhat glossy, glabrous, with reddish lf.-cushions: lvs. linear, usually broadest at the apex, emarginate, grooved and glossy dark green above, with 2 whitish lines beneath, 1/4 – 3/4 in. long: cone ovate, 1 – 1 1/4 in. long, the peduncle exceeding the bud-scales: bracts bifid. Japan. 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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Propagation

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Pests and diseases

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Species

Gallery

  • Tsuga-sieboldii-cone.jpg
  • Tsuga-sieboldii-foliage.jpg

  • photo 1

  • photo 2

References

External links


  1. ↑ 1.0 1.1 Mitchell, Alan (1974). Trees of Britain & Northern Europe. London: Harper Collins Publishers. pp. 146. ISBN 0-00-219213-6. 
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