Larix occidentalis

Larix occidentalis (Western larch, fr. Mélèze occidental) is a species of larch in the pine family. Etymology: Latin. occidēns - "west", lat. -alis - used to form an adjective.
Content
1 Distribution, Ecology
2 Description
3 Usage
4 Threats and Protection
5 Links
Distribution, Ecology
Countries of distribution: Canada (British Columbia); USA (Idaho, Montana, Oregon, Washington). Larch western grows in the mountains, at an altitude of 600 m and 2100 m above sea level, usually on gray-brown, well-drained podzolic mountain soils, moderate acid. The climate is cold, with cool summers and humid winters, annual rainfall ranges from 450 mm to 875 mm, most of them are snow. May occur in pure plantations; at the initial stage after a disturbance (for example, a fire) Pinus contorta var may be dominant. latifolia, and Pinus ponderosa in certain areas; later Pinus monticola, Pseudotsuga menziesii, Abies grandis and Abies lasiocarpa, finally Thuja plicata and Tsuga heterophylla take their place.
Description
Leaves and mature cones
Trees up to 50 m high; a long clean trunk reaching 200 cm in diameter at the breast level; crown short, conical. The bark is thin and flakes young, in adult trees becomes thick (up to 15 cm), deeply furrowed, reddish-brown. The branches are horizontal, sometimes lowered at the bottom of the crown. The buds are dark brown. Needles 2-5 cm long 0.65-0.80 mm wide, 0.4-0.6 mm thick, soft, pale green, becoming bright yellow in autumn. Seed cones oval when closed, ovate, when open, 2-3 × 1.3-1.6 cm in size, on curved stems. Pollen 71-84 microns in diameter. Seeds are reddish-brown, body 3 mm, wing 6 mm. 2n = 24.
The highest known tree of the genus Larch belongs to the species Larix occidentalis, it grows near Green Creek in English. Umatilla National Forest, Oregon. Height 58.5 m diameter at breast level 138 cm (Van Pelt 2000). The age of the tree is 920 years, reported by the number of stump rings in continuous felling near Cranbrook, British Columbia (Stoltmann 1993).


Western larch is an important source of wood. It can grow to a huge size with a straight trunk and grow quickly in height, although the increase in girth takes longer. The wood is strong, solid and strong and is used for long poles, rail sleepers, mine wood, fine plywood, and as a balance wood for the paper industry. Wood resin has useful water-soluble properties and is used for various industrial products, especially used for ink, ink and offset printing. The use of this species in landscaping is limited, although plantations should grow well in cold climates. Seeds are important food for some birds, including Carduelis pinus, Acanthis, Loxia leucoptera.
Threats and Conservation
No specific threats have been identified for this species. This species is present in several protected areas.
Links
The Gymnosperm Database
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Species of larch
Larix decidua · Larix gmelinii · Larix griffithii · Larix kaempferi · Larix laricina · Larix lyallii · Larix mastersiana · Larix occidentalis · Larix potaninii · Larix sibirica
This is an unfinished article about the Sosnovo family.


Larix occidentalis

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