Aquatic and Wetland Vascular Plants of the Northern Great Plains
41. Lamiaceae, the Mint Family
1. Lycopus L. -- Bugleweed3. Lycopus uniflorus Michx.
Similar to L. asper in habit, 1-5 dm tall, puberulent at least above. Leaf blades ovate-lanceolate to oblong-lanceolate, 4-10 cm long, 1.5-4 cm wide, acute to short-acuminate, irregularly and coarsely dentate, cuneate to the short-petioled or subsessile base. Calyx lobes broad, triangular to ovate, soft, obtuse to bluntly acute, 0.5-1 mm long, shorter than to about equaling the nutlets; corolla white or pinkish, 2.5-3.5 mm long, clearly surpassing the calyx. Nutlets mostly 1.2-1.5 mm long, the outer apical margin subtruncate and shallowly toothed. Jul--Sep. Swamps, stream banks and springs, where water is fresh; occasional in e and c ND, e SD and the Black Hills, e and c NE; (Newf. to AK, s to NC, OH, IL, OK, MT and OR).
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