2 species
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Physocarpus capitatusPacific ninebark
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to Idaho.
Habitat: Moist woods and swamps in the lower mountains.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Physocarpus malvaceusmallow ninebark, mallow-leaf ninebark
Distribution: Occurring east of the Cascades crest in eastern Washington; British Columbia to Oregon and Nevada, east to Alberta, Montana, Wyoming, and Colorado.
Habitat: Canyons and hillsides, grasslands, ponderosa pine and Douglas-fir forest openings and edge.
Origin: Native
Flowers: May-July
Growth Duration: Perennial