Vascular Plants - Pinaceae - Larix:
Larix occidentalis
Page Authors: Don Knoke, David Giblin
western larch, Montana or mountain larch, hackmatack, tamarack 
Blooms: May - June
Habit: tree
Duration: perennial
Origin: Native
Distribution: East of the Cascades, British Columbia to Oregon, east to Montana and Alberta
Habitat: Mountain valleys and lower slopes, often in swampy areas
Species Description:

General: A large tree up to 80 m. tall, the trunk ultimately largely bare.
Bark: Bark ultimately very thick, furrowed into large plates, flaking into cinnamon-colored scales; young twigs glabrous to pubescent.
Leaves: Needles in false whorles of 15-30 per spur, pale green, stiff, 2.5-4.5 cm. long, broadly triangular in cross-section, deciduous.
Cones: Staminate cones on short, lateral, naked branches, yellow, 1 cm. long; ovulate cones 2.5-3 cm. long, the scales reddish-brown, somewhat woolly on the lower surface, much shorter than the greenish-brown to yellowish-red, long bracts; the two cones often adjacent.
Accepted Name:
Larix occidentalis Nutt.
Synonyms:
(none)

Treated in Flora of the PNW as:
Larix occidentalis
Additional Resources:

PNW Herbaria Specimens: View list of all Larix occidentalis specimens in the Consortium of Pacific Northwest Herbaria database.

WTU Herbarium Specimens: View list of Larix occidentalis specimens in the WTU Herbarium database.

Washington Flora Checklist: Larix occidentalis treatment.

E-Flora BC: Larix occidentalis atlas page.

CalPhotos: Larix occidentalis images.

USDA Plants Database: Larix occidentalis.
Additional photographs of Larix occidentalis:
(click on a thumbnail to view larger photo)

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2005

Ben Legler, 2005

H. Tim Gladwin, 1983

H. Tim Gladwin, 1983

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Bud Kovalchik

Clayton J. Antieau, 2009

Clayton J. Antieau, 2009

Clayton J. Antieau, 1984

Robert L. Carr, 2006

Robert L. Carr, 2006

Robert L. Carr, 2006

Susan McDougall, 2005

Susan McDougall, 2005

Robert L. Carr, 2012

Robert L. Carr, 2012

Robert L. Carr, 2012
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Washington Native Plant Society
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