Burke: Rosa pisocarpa vs. Rosa rugosa

	Rosa pisocarpa	Rosa rugosa
	clustered rose, peafruit rose	rugosa rose
Habit	Deciduous shrub 1-2 m. tall, prickly to nearly unarmed, the prickles straight, the stem not bristly.
Leaves	Leaves alternate, pinnate, puberulent on the lower surface, not glandular; leaflets 5-9, elliptic to ovate, 1.5-4 cm. long and 0.7-2 cm. wide, finely serrate.
Flowers	Flowers small, in flat-topped cymes terminating the branches of the season, seldom solitary; calyx lobes 5, 1-1.5 cm. long and 2.5-3.5 mm. wide at the base, constricted in the middle, with coarse, stalked glands on the back; the calyx tube glabrous and bluish-glaucous, 3-5 mm. thick; petals 5, 1.2-2 cm. long, pink; stamens and pistils numerous.
Fruits	Hips purplish, globose or ellipsoid, 6-12 mm. long and thick, the achenes numerous, 3 mm. long, stiffly long-hairy along one side.

	Rosa pisocarpa	Rosa rugosa
Flowering time	May-July	June-August
Habitat	Thickets, stream banks, and swampy places at lower elevations.	Edge of saltwater beaches, roadsides, forest edge, fields, and other disturbed areas.
Distribution	Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; southern British Columbia to California. [WildflowerSearch map] [BONAP county map]	Occurring west of the Cascades crest in coastal marine habitats; Alaska to Oregon; also in the north-central and northeastern areas of North America. [WildflowerSearch map] [BONAP county map]
Origin	Native	Introduced from Asia
Conservation status	Not of concern	Not of concern
Sibling taxa	R. canina, R. gymnocarpa, R. multiflora, R. nutkana, R. rubiginosa, R. rugosa, R. woodsii	R. canina, R. gymnocarpa, R. multiflora, R. nutkana, R. pisocarpa, R. rubiginosa, R. woodsii
Subordinate taxa	R. pisocarpa var. pisocarpa
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, OR, WA Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Rosa pisocarpa

Rosa rugosa

clustered rose, peafruit rose

rugosa rose

Habit

Deciduous shrub 1-2 m. tall, prickly to nearly unarmed, the prickles straight, the stem not bristly.

Leaves

Leaves alternate, pinnate, puberulent on the lower surface, not glandular;

leaflets 5-9, elliptic to ovate, 1.5-4 cm. long and 0.7-2 cm. wide, finely serrate.

Flowers

Flowers small, in flat-topped cymes terminating the branches of the season, seldom solitary;

calyx lobes 5, 1-1.5 cm. long and 2.5-3.5 mm. wide at the base, constricted in the middle, with coarse, stalked glands on the back; the calyx tube glabrous and bluish-glaucous, 3-5 mm. thick;

petals 5, 1.2-2 cm. long, pink;

stamens and pistils numerous.

Fruits

Hips purplish, globose or ellipsoid, 6-12 mm. long and thick, the achenes numerous, 3 mm. long, stiffly long-hairy along one side.