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Low to medium shrub, 0.5-2 m tall, spreading by rhizomes and sometimes thicket-forming; stems spindly to stout, erect to spreading, usually with a pair of straight prickles near the base of the leaves, bristly internodal prickles present or absent, usually lacking on flowering shoots; mature stems blackish.
Alternate, deciduous, odd-pinnately compound, the axis short-hairy; leaflets 5, 7 or 9, elliptic to egg-shaped, 1.5-6 cm long, finely and closely saw-toothed, short-hairy beneath; stipules short-hairy and sometimes glandular-blunt-toothed.
Inflorescence of (1) 2 to 10 stalked flowers in a small, short cluster at the end of a lateral branchlet; corollas pink, saucer-shaped, rather small (3-5 cm across), the petals 5, 12-20 mm long; calyces 5-lobed, the lobes lanceolate, long-tapering and narrrowing then flaring below the tip, 10-15 mm long, stalked-glandular on the back, persistent; ovaries superior but enclosed in the urn-shaped floral tube (hypanthium), the hypanthium glaucous; stamens numerous.
Achenes, numerous, stiffly long-hairy on one side, enclosed by the fleshy hypanthium, which ripens into a reddish-purple, globe- or pear-shaped to ellipsoid hip 6-12 mm long.
Source: The Illustrated Flora of British Columbia