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
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Species Information

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General:
Medium shrub, 0.5-2 m tall; branches erect to arching, angled, minutely star-shaped-hairy when young, eventually with brown, papery, shredding bark.
Leaves:
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.
Flowers:
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.
Fruits:
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:
White
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

Ecology

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

Minimum

Average

Maximum

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
Class
C
Number of field plots
 species was recorded in:
259
Modal BEC Zone Class
ICH
All BEC Zones (# of stations/zone) species was recorded in: ICH(155), IDF(76), MS(3), PP(18)

Climate

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

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General References