Sidalcea hendersonii S. Watson
Henderson's checker-mallow (Henderson's checkerbloom)
Malvaceae (Mallow family)

Introduction to Vascular Plants


© Judith Holm     (Photo ID #70412)


E-Flora BC Static Map

Distribution of Sidalcea hendersonii
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Henderson's checker-mallow is a native plant species found in wet meadows, estuaries and tidal flats in southwestern British Columbia.

Species Information

Perennial herb from a strong taproot and short spreading rhizomes; stems erect or decumbent, hollow, purple-tinged, glabrous or nearly so at the base, 50-150 cm tall.
Basal leaves round or heart-shaped, shallowly lobed, toothed, long-stalked; stem leaves alternate, stalks reduced upwards, palmately 5-lobed into oblong segments; stipules purple-tinged.
Inflorescence of numerous flowers in congested, compound, spike-like, terminal clusters on stalks 1-3 mm long; petals 5, deep pink, 1.5-2 cm long; calyces 9-15 mm long, 5-lobed, glabrous, fringed on the margins, bractlets lacking.
Carpels, 4 mm long, 5-10, nearly glabrous, the beaks about 1 mm long; seeds 1.

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.

Habitat and Range

Wet meadows, estuaries and tidal flats in the lowland zone; rare on S Vancouver Island, the Gulf Islands and adjacent lower mainland; S to OR.

SourceThe Illustrated Flora of British Columbia