Eastern Hemlock (Tsuga canadensis)

[ Trees > Conifers > Hemlocks . . . ]      Forest Type: N. Hardwood, App. Cove

The Woolly Adelgid, an Asian insect, currently threatens the eastern Hemlock throughout much of its range. Attempts to control the woolly adelgid have not been successful, and some experts predict a disaster on the scale of the chestnut blight that wiped out the American chestnut. The adelgid can be seen, covered with white "wool," at the needle bases of infected trees (illustration to the right).


Dark green, short, flattened needles that are grooved; cones small; bark dark and furrowed; growing in northeastern North America.

by Michael Kuo

Habitat: Sometimes in pure stands but usually mixed with other species in northern hardwood forests and Appalachian forests.

Stature: 60-70 feet high; to 3 feet in diameter; pyramid-shaped; branches horizontal.

Needles: Less than 1 inch long; dark green to dark yellow-green; flattened; grooved above.

Bark: Scaly when young, later deeply furrowed; dark gray to dark reddish gray.

Cones: Under 1 inch; scales with smooth edges.

(References consulted)

Frequent Mushroom Associates:

Albatrellus caeruleoporus; Amanita ceciliae; Amanita porphyria; Austroboletus gracilis; many species of boletes (including Imleria badia, Caloboletus inedulis, Pseudoboletus parasiticus, and many species of Suillus); Cortinarius sanguineus; Ganoderma tsugae (named, obviously, for its association with hemlock); Hydnellum aurantiacum; Lactarius affinis var. viridilactis; Lactarius subpurpureus; Phellodon alboniger; Tricholoma magnivelare; Tricholomopsis decora; and many others.


Woolly Adelgid
Wooly Adelgid Infestation

Tsuga canadensis

Tsuga canadensis

Tsuga canadensis

Tsuga canadensis

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Cite this page as:

Kuo, M. (2005, January). Eastern hemlock (Tsuga canadensis). Retrieved from the MushroomExpert.Com Web site: