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

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.

Illustration Source:  The Illustrated Flora of British Columbia