Galeopsis tetrahit (Hemp-Nettle) - photos and description

Galeopsis tetrahit
15 cm ruler for scale

Galeopsis tetrahit

Galeopsis tetrahit

Galeopsis tetrahit

Galeopsis tetrahit

General: Annual weedy species with square stems, stems covered in bristly hairs.

Flowers: Flowers in dense clusters in leaf axils, stalkless, pink in colour, irregular shape. I measured a flower at 1 cm long.

Leaves: Leaves all cauline, ovate, opposite, and coarsely toothed. The blade of the leaf highlighted in photo above was measured at 6 cm long and 33 mm wide.

Height: Height listed in Budd's Flora to 100 cm, I measured plants 36 cm tall.

Habitat: Disturbed moist soil along streams and wetlands.

Abundance: Common.

Origin: Introduced.

When and where photographed: Photos taken July 10th, stream bank, Duck Mountain Provincial Park, 300 km northeast of our home in Regina, SK.