Page author: Don Knoke
Tsuga heterophylla
western hemlock
WTU specimens
Other herbaria

Distribution: Alaska to California, east to Montana, but much more common west of the Cascades

Habitat: Moist, deep forests from sea level to mid-elevations in the mountains

Cones: May - June

Origin: Native

Conservation Status: Not of concern

Description:
General:

Trees to 50 m. tall, with a narrow crown, the leader and branches drooping.

Bark:

Bark dark brown to reddish-brown, becoming thick and furrowed, cross-ridged to form small scales; young branches with both short and long pubescence.

Leaves:

Needles flat, grooved, glossy yellow-green on the upper surface, white over most of the lower surface, 8-20 mm. long, highly variable in length, spread at right angles to the branches.

Cones:

Staminate cones yellow, 3-4 mm. long, on short stalks near the branch tips; ovulate cones ovoid, 1.5-2.5 cm. long, greenish, becoming brown, single at the branch tips.

Accepted Name:
Tsuga heterophylla (Raf.) Sarg.
Publication: Silva. 12: 73, plate 605. 1898. 1898.

Synonyms:
Abies heterophylla Raf.
Additional Resources:

PNW Herbaria: Specimen records of Tsuga heterophylla in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Tsuga heterophylla checklist entry.

E-Flora BC: Tsuga heterophylla atlas page.

CalPhotos: Tsuga heterophylla photos.

USDA Plants: Tsuga heterophylla information.

29 photographs:
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