Sikkim Larch
From Wikipedia, the free encyclopedia
| Sikkim Larch | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 |
||||||||||||||
| Conservation status | ||||||||||||||
| Scientific classification | ||||||||||||||
|
||||||||||||||
| Binomial name | ||||||||||||||
| Larix griffithii Hook.f. |
Sikkim Larch (Larix griffithii) is a species of larch, native to the eastern Himalaya in eastern Nepal, Sikkim, western Bhutan and southwestern China (Xizang), growing at 3000-4100 m altitude.
It is a medium-sized deciduous coniferous tree reaching 20-25 m tall, with a trunk up to 0.8 m diameter. The crown is slender conic; the main branches are level to upswept, the side branchlets pendulous from them. The shoots are dimorphic, with growth divided into long shoots (typically 10-50 cm long) and bearing several buds, and short shoots only 1-2 mm long with only a single bud. The leaves are needle-like, light glaucous green, 2-4 cm long; they turn bright yellow to orange before they fall in the autumn, leaving the pale yellow-brown shoots bare until the next spring.
The cones are erect, ovoid-conic, 4-7.5 cm long, with 50-100 seed scales, each seed scale with a long exserted and reflexed basal bract; they are dark purple when immature, turning dark brown and opening to release the seeds when mature, 5-7 months after pollination. The old cones commonly remain on the tree for many years, turning dull grey-black.
It is sometimes called the Himalayan Larch, not to be confused with Larix himalaica, which is generally known as the Langtang Larch. Synonyms include Abies griffithiana J. D. Hooker ex Lindley & Gordon and Larix griffithiana hort. ex Carrière. Trees to the northeast of the range in eastern Bhutan and Xizang have recently been separated as Larix kongboensis (Mill 1999); they differ in smaller cones 3-5 cm long. This taxon has been accepted by the Flora of China but not widely elsewhere.
[edit] References and external links
- Conifer Specialist Group (1998). Larix griffithii. 2006 IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 12 May 2006.
- Flora of China: Larix griffithii
- Mill, Robert (1999). A New Species of Larix (Pinaceae) from Southeast Tibet and Other Nomenclatural Notes on Chinese Larix. Novon 9 (1): 79–82. doi:.
