General: Perennial herb from a stolon; stems erect, branched, 50-90 cm tall, densely-soft-hairy, 4-angled; strongly fragrant, apple-scented.
Leaves: Opposite, egg-shaped, oblong, or broadly elliptic, 1-4 cm long, bases slightly notched, tips generally rounded, margins toothed, hairy and wrinkled above, dense-woolly beneath; unstalked, or nearly so.
Flowers: Inflorescence of many flower clusters crowded into terminal spikes, subtended by linear or awl-like bracts; flower stalks hairy; corollas tubular, 2-3 mm long, pinkish or white, hairy outside, 4-lobed, the lobes nearly equal; calyces 1-1.5 mm long, short-hairy.
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.
