E-Flora BC: Electronic Atlas of the Flora of British Columbia

Physocarpus malvaceus (Greene) Kuntze
mallow ninebark
Rosaceae (Rose family)

Introduction to Vascular Plants

© Jim Riley  Email the photographer   (Photo ID #27926)

E-Flora BC Static Map
Distribution of Physocarpus malvaceus
Click here to view our interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.

Medium shrub, 0.5-2 m tall; branches erect to arching, angled, minutely star-shaped-hairy when young, eventually with brown, papery, shredding bark.
Alternate, deciduous, stalked, the blades egg- to heart-shaped in outline, 3-5 cm long, palmately 3- to 5-lobed, the lobes irregularly double-toothed, star-shaped-hairy at least on the lower surface.
Inflorescences dense, terminal, half-rounded clusters of several to many stalked flowers, the stalks star-shaped-hairy; corollas white, saucer-shaped, the petals 5, nearly circular, about 3 mm long; calyces densely star-shaped-hairy, 5-lobed, the lanceolate lobes about 3 mm long, somewhat bent back; ovaries superior; stamens about 30.
Follicles, 2, joined at the base at least to midlength, inflated, 7-10 mm long, densely star-shaped-hairy; seeds 1 to 4 per follicle, hardened, shiny.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

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

Habitat / Range

Dry rocky hillsides and open forests in the montane zone; locally frequent in SE BC, rare in SC BC; E to AB and S to WY, UT and OR.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Physocarpus malvaceus

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) 450 861 1585
Slope Gradient (%) 0 39 108
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
4 202 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 2 5
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: ICH(155), IDF(76), MS(3), PP(18)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References