|Scientific Name:||Abies lasiocarpa|
|Species Authority:||(Hook.) Nutt.|
Pinus lasiocarpa Hook.
|Taxonomic Notes:||Two varieties are recognized for Abies lasiocarpa: the widespread nominate variety (var. lasiocarpa) and var. arizonica (Merriam) Lemmon from Arizona, Colorado and New Mexico. Flora of North America Vol. 2 (1993) treated the Pacific coast mountains population as A. lasiocarpa and the Rocky Mountain population, including A. lasiocarpa var. arizonica, as Abies bifolia A.Murray bis. The author of the genus Abies in FNA, unlike most taxonomists, assigned taxonomic significance to different chemical compounds, or their proportional presence, in the resin. Eckenwalder (2009) upheld the two taxa as varieties, but even this is disputable and is not recognized here.|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Reviewer/s:||Thomas, P. & Stritch, L.|
This is the most widespread fir, after Abies balsamea, in North America. It is largely confined to high altitudes at the temperate latitudes and of little use as a timber tree. The very large extent of occurrence and large population mean that it is assessed as Least Concern. The variety arizonica is also assessed as Least Concern although it occurs in scattered subpopulations of limited area of occupancy in the southernmost part of the range of the species.
|Range Description:||Recorded from western North America: from Yukon to New Mexico, Arizona and N California. Both the extent of occurrence and the area of occupancy are well beyond the thresholds for any threatened category.|
Native:Canada (Alberta, British Columbia, Northwest Territories, Yukon); United States (Alaska, Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, Wyoming)
|Range Map:||Click here to open the map viewer and explore range.|
|Habitat and Ecology:||
This is a species of the subalpine zone in the high mountains of W North America, occurring from 5 m to 1,500 m a.s.l. in the north of its range and between 600 m and 3,500 m in the Cascade Range and Rocky Mountains. It grows on a variety of high mountain lithosols, wet or dry. The climate is everywhere cold, but humid in the NW and dry in the S of its range, precipitation varies between 500 mm and 3,000 mm annually. It forms usually very open stands with solitary or clustered trees, often mixed with Tsuga mertensiana in the NW and with Picea engelmannii in most of the Rocky Mountains. Other conifers are mainly Pinus spp., and also Abies spp. in the Pacific Northwest. Alpine meadows typically occur between the clumps of conifers.
Var. arizonica is most commonly mixed with Picea engelmannii, Pinus aristata and P. flexilis, or it occurs in pure stands, at elevations between 2,400 and 3,650 m a.s.l.
|Major Threat(s):||No specific threats have been identified for this species: increased fire frequencies and overgrazing by livestock are potential threats.|
|Conservation Actions:||Many subpopulations occur in protected areas.|
|Citation:||Farjon, A. 2013. Abies lasiocarpa. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 10 December 2013.|
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