General:
Deciduous tree, 10-30 m tall; bark white or brown, often peeling; twigs short-hairy, not glandular.
Leaves:
Alternate, deciduous, rounded in outline, hairy below, rarely glandular, 1-5 cm long.
Flowers:
Male and female flowers in separate catkins, the male 3-6 cm long, the female 1-4 cm long; flowers emerging before or with the leaves; catkins breaking up at maturity.
Fruits:
Nutlets with broad wings, at least 1-1 1/2 times as wide as the body of the nutlets; bracts with rounded lateral lobes.
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
Synonyms and Alternate Names:
Betula alba L.
Betula pubescens subsp. pubescens Ehrh.