Scouler's Willow
Salix scouleriana
Poplar-Willow family (Salicaceae)

Willows are quite difficult to identify to the exact species, usually requiring special keys and often observations made over the entire growing season. This is a challenge and a very rewarding experience. Salix scouleriana, Scouler's Willow, is a bit easier to identify than most willows because it is distinctive in several ways: It can be found at altitudes to 10,000' and is the only willow in the Rocky Mountains found on drier mountain slopes. Stems can be 5, 10, or even 15 inches in diameter. But thickets of much smaller plants are the norm. Scouler's Willow leaves are wider at the tip than the base, which is also unusual for willows. Scouler was a Scottish botanist who accompanied David Douglas, of Douglas Fir fame, and his expedition to Vancouver.

Description

Shrub to tree, up to 25' tall, with dark green spatulate leaves, 1-3" long, the largest leaves often serrated. The leaves are hairy when young, becoming smooth on the upper side when mature. Dark or purple floral bracts, which appear before the leaves.

Field Marks

Willow family tree with leaves that are wider at the tip and often found growing on mountain slopes at higher altitudes.

© Al Schneider