Perennial herb from short rhizome and long, leafy and rooting stolon; stems simple, 10-30 cm long/tall, somewhat hairy along 2 opposite sides, 4-angled.
Basal leaves in a rosette, egg-shaped or oblong, 4-7 cm long, entire to somewhat toothed, rounded at tip, becoming glabrous with age, often bronzy, gradually tapering to long stalk; stem leaves to many, opposite, shorter, more or less unstalked.
Inflorescence of 5 to 7 flowers in axillary whorls, forming a leafy, terminal spike; upper bracts of inflorescence shorter than flowers, somewhat blue-tinted, egg-shaped, entire; corollas tubular, blue or rarely pink or white, the tube exserted, the upper lip very short, the lower lip conspicuous, 3-lobed; calyces bell-shaped, 5-6 mm long, the teeth shorter than tube.
Nutlets, 4 clustered together, egg-shaped, net-veined.
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
Source: The USDA