General:
Deciduous shrub, 0.3-2 m tall; young twigs densely glandular and distinctly short-hairy.
Leaves:
Alternate, deciduous, oval to round, usually coarsely toothed, thick and leathery in texture, 0.5-3 cm long; leaf stalks less than 1 cm long.
Flowers:
Male and female flowers in separate catkins 1-2.5 cm long; flowers emerging before or with the leaves; catkins breaking up at maturity.
Fruits:
Nutlets with wings relatively narrow, less than half the width of the body of the nutlets.
If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.
Illustration Source: The Illustrated Flora of British Columbia