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Biennial or perennial herb from a fibrous root; stems erect, several, branched, glandular above, 30-90 cm tall.
Basal leaves egg-shaped, narrowed to winged stalks, hairy; stem leaves opposite, broadly elliptic to egg-shaped-elliptic, 4-10 cm long, 2-4 cm wide, hairy; stipules lacking.
Inflorescence many-flowered, in clusters, flowers unisexual, plants both male and female; petals 5, red to purplish-red or pink, stalklike at the bases, deeply 2-cleft; sepals 5, usually purplish, hairy, the hairs with purple cross walls, united, forming a tube 10-15 mm long, slightly glandular.
Capsules egg-shaped, with 5, 2-toothed valves; seeds black, densely roughened.
Hybrids between S. dioica and S. latifolia ssp. alba have been collected in the lower Fraser Valley and N to Prince George (McNeill 1978).
Source: The Illustrated Flora of British Columbia