E-Flora BC: Electronic Atlas of the Flora of British Columbia

Larix occidentalis Nutt.
western larch
Pinaceae (Pine family)

Introduction to Vascular Plants

© Bryan Kelly-McArthur  Email the photographer   (Photo ID #70575)

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Distribution of Larix occidentalis
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Introduction

The western larch is unusual in that it is a deciduous coniferous tree that loses its needles in the winter.

Species Information

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General:
Large tree, up to 55 (rarely 70-80) m tall; bark thick, furrowed into large plates, scales cinnamon colored; young twigs glabrous to hairy, not woolly-hairy.
Leaves:
Needles deciduous; pale green (yellow in the autumn); stiff; 15-30 per spur; 25-45 mm long; broadly triangular in cross-section.
Cones:
Seed cones 25-30 (35) mm long, yellowish-brown; pollen cones yellow, about 10 mm long.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Red
Blooming Period:
Spring
Fruit/Seed characteristics:
Colour: Brown
Present from Summer to Fall
Source:  The USDA

Habitat / Range

Moist to dry slopes in the montane zone; common in SC and SE BC; E to SW AB, and S to OR, NW MT, and N ID.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Larix occidentalis

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 110 1121 2635
Slope Gradient (%) 0 28 235
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 325 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 7
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
1955
Modal BEC Zone Class
ICH
All BEC Zones (# of stations/zone) species was recorded in: AT(2), ESSF(166), ICH(1026), IDF(379), MS(283), PP(16)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References