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General:
Perennial herb from a taproot; white to greyish short-hairy throughout; stems clustered, erect, branched, 30-100 cm tall, 4-angled.
Leaves:
Opposite, triangular egg-shaped and heart-shaped at base, 2.5-7 cm long, 1.5-5 cm wide, coarsely toothed, densely short-appressed-hairy beneath; stalked; uppermost leaves scarcely reduced.
Flowers:
Inflorescence a short, dense, spike-like cluster of flowers, 2-8 cm long and 1.5-2.5 cm wide, at ends of main stem and branches, subtended by leaves or the upper by short linear bracts; corollas tubular, whitish with purple spots, 6-10 mm long, short-hairy outside, the upper lip erect, hooded, 2-lobed, the lower lip spreading, dotted with purple, 3-lobed, the lateral lobes small, the central lobe broad and minutely-scalloped; calyces tubular, 5-6 mm long, 15-veined, teeth awl-shaped, hairy, and shorter than tube.
Fruits:
Nutlets, 4 clustered together, egg-shaped, smooth.
Source: The Illustrated Flora of British Columbia
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