5 species
2 subspecies and varieties
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Viburnum edulehigh-bush cranberry, squashberry
Distribution: Widely distributed on both sides of the Cascades in Washington; Alaska south to Newfoundland, south to northern Oregon, Colorado and Pennsylvania.
Habitat: Moist woods and swamps.
Origin: Native
Flowers: May-July
Viburnum ellipticumwestern blackhaw, oval-leaved viburnum
Distribution: Occurring west of the Cascades crest chiefly along the southern border in Washington; southern Washington to northern California.
Habitat: Thickets, bottom lands, and open woods at low to middle elevations.
Origin: Native
Flowers: May-June
Viburnum lantanawayfaring-tree
Origin: Introduced
Viburnum opulushighbush cranberry
Distribution: Scattered localities throughout Washington; British Columbia south to the Columbia River Gorge, east to Idaho and Montana.
Habitat: Moist woods at low to moderate elevations.
Origin: Native
Flowers: May-July
var. americanum – American bush cranberry, cranberry-tree
var. opulus – high-bush cranberry
Viburnum tinuslaurustinus
Origin: Introduced