Family = Betulaceae,
Displaying matches 1 - 11 of 11.
(= Alnus incana in Flora of the Pacific Northwest)
Monoecious, deciduous shrubs 2 to 10 m. tall, the bark grayish-brown to reddish, the new growth usually downy-puberulent.
Distribution: Alaska to New Mexico in the West, east across the northern states to the Atlantic
Habitat: Moist places, streamside, low to high elevations
(= Alnus rhombifolia in Flora of the Pacific Northwest)
Monoecious, deciduous small trees 5-20 m. tall, the old bark light-colored, the new growth puberulent.
Distribution: East of the Cascades, British Columbia to California, east to Idaho
Habitat: Near streams at low elevations
(= Alnus rubra in Flora of the Pacific Northwest)
Monoecious, deciduous trees to 25 m. tall, the bark thin, smooth and gray, the trunk up to 8 dm. thick; fresh wood tends to turn deep red.
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska south to California, disjunct to the east in northern Idaho.
Habitat: Moist areas at low elevations.
(= Alnus sinuata in Flora of the Pacific Northwest)
Monoecious, deciduous shrubs mostly 2-4 m. tall, the bark reddish-brown, becoming grayish-black, the young growth glabrous but with sessile glands.
Distribution: Alaska to California, east to Wyoming; also, Minnisota to Maine, and adjacent Canada
Habitat: Moist areas, low to high elevations
: Monoecious, deciduous shrubs 1-3 m. tall, the young branches puberulent, resinous with crystalline glands, the bark becoming reddish-brown, not peeling.
Distribution: Alaska south to the Sierra of California, east to Nevada and Colorado, and also to Newfoundland and New York.
Habitat: Stream banks, margins of marshes, lakes and bogs, and on alpine slopes.
(= Betula occidentalis vars. in Flora of the Pacific Northwest)
Monoecious, deciduous shrubs or small trees to 8 m. tall, the young twigs with crystalline glands, the older wood smooth and coppery to reddish-brown, not peeling.
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska south to California, east in Canada to Ontario, east in the U.S. to the Rocky Mountains and northern Great Plains.
Habitat: Moist areas, streambanks at low elevations.
(= Betula papyrifera in Flora of the Pacific Northwest)
Monoecious, deciduous small tree 15-20 m. tall, the young twigs puberulent and covered with flattened glands that are more or less peltate and not at all resinous; older wood from cherry to chalky-white and peeling.
Distribution: Alaska to Oregon, east of the Cascades except in northwest Washington, east to the Atlantic coast
Habitat: Moist, open to dense woods, low to moderate elevations
(taxon is not treated in Flora of the Pacific Northwest)
Monoecious, deciduous trees to 25 m., trunks usually several, the crowns spreading; bark of mature trees creamy to silvery-white, smooth, peeling in long strips; lenticels dark; branches pendulous, twigs glabrous, dotted with small, resinous glands.
Distribution: Occurring in Washington on both sides of the Cascades; Introduced as an ornamental in Washington; occurring in isolated locations in south-central Canada and the eastern U.S.
Habitat: Disturbed areas associated with urban and suburban development where the trees escape from cultivation.
(= Betula papyrifera var. subcordata, Betula piperi in Flora of the Pacific Northwest)
(taxon is not treated in Flora of the Pacific Northwest)
Monoecious, deciduous shrubs to 5 m. tall; bark coppery brown; branches ascending; twigs pubescent, covered with bristly, glandular hairs.
Distribution: Widely planted as an ornamental and occasionally naturalizing in western Washington lowlands; British Columbia south to Oregon.
Habitat: Abandoned plantings, roadsides, waste sites, forest edge.
(= Corylus cornuta in Flora of the Pacific Northwest)
Multi-stemmed shrub 1-4 meters tall with alternate leaves. First-year twigs typically hairy to glandular, becoming glabrous (smooth) in second year.
Distribution: Widespread in North America from British Columbia to Newfoundland, south to California, Colorado, Missouri, Ohio, and Georgia. In WA on both sides of the Cascades, and in the eastern portion of the state.
Habitat: Forest edge and openings, thickets, and rocky slopes at low to middle elevations.
