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General:
Perennial herb from a creeping rhizome; stems ascending to erect, several, branched, 4-angled, bristly at the nodes otherwise smooth, 15-45 cm tall.
Leaves:
Basal leaves few, soon deciduous; stem leaves in whorls of 6-10 (typically 8), oblanceolate, 1-veined, short-hairy on the margins and the veins beneath, 2.5-4 cm long.
Flowers:
Inflorescence a loose cluster of many stalked flowers; corollas funnel-shaped, white, 4-6 mm long, 4-lobed, the lobes about equal to the tubes.
Fruits:
Nutlets, 2, 2-3 mm long, with numerous, short, hooked bristles.
Source: The Illustrated Flora of British Columbia
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