Family: Rosaceae,
Rose
Genus: Physocarpus
Description
General: spreading to erect shrub 50-100 cm tall, the
branches angled, arching, with brown, shredding bark,
hairless or with minute, star-shaped hairs.
Leaves: alternate, the stalks slender, 1-3 cm long. Leaf
blades ovate to heart-shaped, 3- or 5-lobed less than half
the length and again irregularly double-toothed, rounded to
pointed at tip, 2-6 cm long and nearly as broad, sparsely
with star-shaped hairs to hairless and dark green above,
paler and usually copiously covered with star-shaped hairs
on the lower surface.
Flowers: several in small, dense, round clusters. Calyx
finely covered with star-shaped hairs, the 5 lobes ovate-
lanceolate, about 3 mm long, somewhat bent back. Petals
5, white, round, about 4 mm long. Stamens about 30, equal
to or longer than the petals. Pistils usually 2, sometimes 3,
the styles about equaling the stamens.
Flowering time: June-July.
 Fruits: follicles, in pairs, reddish, fuzzy, about 5 mm
long, egg-shaped, flattened, keeled, with erect styles,
joined on the lower half.
Distribution
Canyon bottoms and rocky hillsides to ponderosa pine and
Douglas fir forest; in w. and c. parts of MT. Also from s.c.
B.C. and Alberta to WA, OR, WY and UT. |
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