Page author: David Giblin
Galeopsis tetrahit
common hemp nettle
WTU specimens
Other herbaria

Distribution: Chiefly west of the Cascades in Washington; Alaska to Newfoundland, south to Central Plains and Mid-Atlantic states.

Habitat: Meadows and other moist places.

Flowers: July-August

Origin: Introduced from Eurasia

Conservation Status: Not of concern

Description:
General:

Annual herbs, the stems 1.5-7 dm. tall, usually branched, with retrorsely spreading hairs and shorter, gland-tipped hairs.

Leaves:

Leaves opposite, petiolate, the blades rhombic-elliptic to ovate, 3-10 cm. long and 1-5 cm. broad, with short, stiff hairs.

Flowers:

Inflorescence of several dense verticels, the lower often remote, subtended by a pair of small leaves; calyx about 1 cm. long, the 5 erect, spine-tipped lobes about equaling the tube; corolla 15-23 mm. long, purple or pink with darker markings, two-lipped, the upper lip hood-like and enclosing the 4 stamens, the lower lip spreading, 3-lobed, with a pair of projections on the upper side near the base, the middle lobe truncate; style slender, 2-parted; ovary superior, 2-celled.

Fruits:

Fruit of 4 nutlets

Accepted Name:
Galeopsis tetrahit L.
Publication: Sp. Pl. 2: 579-580 1753.

Synonyms & Misapplications:
(none provided)
Infraspecies:
var. tetrahit – common hemp nettle
Additional Resources:

PNW Herbaria: Specimen records of Galeopsis tetrahit in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Galeopsis tetrahit checklist entry.

E-Flora BC: Galeopsis tetrahit atlas page.

CalPhotos: Galeopsis tetrahit photos.

USDA Plants: Galeopsis tetrahit information.

17 photographs:
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