Annual herb from a short taproot; stems slender, weak, ascending or reclining with tips ascending, 10-40 cm long, generally branched from the base, glabrous to inconspicuously hairy, 4-angled.
Opposite, rounded to egg- or heart-shaped, 1-2 cm long, 1-3 cm wide, margins coarsely blunt-toothed or with small lobes, hairy on upper surface; lower leaves stalked, upper leaves unstalked and clasping.
Inflorescence of several well-spaced flower clusters in axils of leaf-like bracts, the bracts unstalked, usually wider than long; corollas tubular, purplish, 12-18 mm long, glabrous inside, hairy outside, strongly 2-lipped, the upper corolla lip erect, oval, hood-like, hairy, 3-5 mm long, the middle lobe of lower corolla lip spotted, the lateral lobes very small, represented by a short tooth; calyces 5-8 mm long, 5-veined, the teeth narrow and erect with pointed tips, about the length of the tube, hairy; occasional plants produce small, unopened flowers.
Nutlets, 4 clustered together, three-angled, squared-off at tips.
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
Synonyms and Alternate Names:
Lamium amplexicaule var. album A.L. Pickens & M.C. Pickens