Aquatic and Wetland Vascular Plants of the Northern Great Plains
41. Lamiaceae, the Mint Family
1. Lycopus L. -- Bugleweed
1. Lycopus americanus Muhl. ex Bart. -- American bugleweed
Simple or more often branched perennial 2-8 dm tall, from nontuberiferous rhizomes,
glabrous or strigulose in the upper part. Leaves short-petioled to subsessile,
the blades coarsely and irregularly incised-toothed to subpinnatifid with the
lowest teeth largest, lanceolate to linear-lanceolate in outline, 3-8 cm long,
1-4 cm wide, acute at the tip, cuneate at the base. Calyx lobes slender,
firm, sharply pointed, 1-2 mm long, distinctly surpassing the nutlets at maturity;
corolla white, sometimes pink to purple-dotted, weakly surpassing the
calyx. Nutlets rounded apically on the outer margin, mostly 1-1.5 mm
long, the corky ridge continuous over the rounded apex. Jul--Sep. Marshes, wet
meadows, shores, stream banks, ditches, springs and other wet places; common;
(Newf. to B.C., s to FL, TX and CA).