Rosa pisocarpa A. Gray
clustered wild rose (cluster rose; peafruit rose)
Rosaceae (Rose family)

Introduction to Vascular Plants


© Adolf Ceska     (Photo ID #13812)


E-Flora BC Static Map

Distribution of Rosa pisocarpa
Click here to view the full interactive map and legend

Species Information

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.

SourceThe Illustrated Flora of British Columbia


If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

USDA Species Characteristics

Flower Colour:
Blooming Period:
Fruit/Seed characteristics:
Colour: Red
Present from Spring to Fall
Source:  The USDA


Ecological Framework for Rosa pisocarpa

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres)
161 1 805
Slope Gradient (%)
1 0 2

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

315 315 315
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
6 5 7
Modal Nutrient Regime
# of field plots
 species was recorded in:
Modal BEC Zone Class

All BEC Zones (# of stations/zone) species was recorded in

CDF(5), IDF(1)

Habitat and Range

Moist to wet thickets, streambanks and swamps in the lowland and montane zones; frequent in SW BC; S to N CA.

SourceThe Illustrated Flora of British Columbia


Synonyms and Alternate Names:
Rosa pisocarpa var. rivalis (Eastw.) Jeps.
Rosa rivalis Eastw.