Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
41. Lamiaceae, the Mint Family
6. Stachys L. -- Hedge-nettle
2. Stachys tenuifolia Willd.
Similar to the preceding, 4-10 dm tall; stems glabrous or retrorsely
bristled on the angles, the sides glabrous, bearded at the nodes. Leaves
sessile or on petioles to 2 cm long, the blades ovate-lanceolate to oblong-lanceolate,
6-14 cm long, 2-6 cm wide, glabrous or with a few scattered hairs, acute to
acuminate, serrate on the margins, rounded to cordate at the base. Calyx
5-7 mm long, usually with eglandular hairs only; corolla as in the preceding.
Jun--Sep. Alluvial woods and stream banks; occasional from e ND to e NE; (NY
to Man., s to SC, TN, LA and TX).
Some plants from e ND appear to have characteristics of S. palustris
var. pilosa, i.e., having some glandular hairs intermixed with eglandular
hairs on the calyces. Further studies on Stachys in e ND and w MN are
needed to determine the true relationships of these populations.
Previous Section -- Stachys palustris L.
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