Scientific name: Galeopsis tetrahit L.
Common name: Common Hemp-nettle
Description
Habit: Annual, to 60 cm high.
Stems: Erect, square, rough with stiff and bristly hairs.
Leaves: Opposite, stalked, lanceolate and tapered at the base; undivided, toothed.
Flowers: Mauve or white, zygomorphic, 12-20 mm, in axillary whorl-like clusters; calyx tubular, of five fused sepals, 5-toothed, teeth equal; corolla tubular, of 5 fused petals, 2-lipped, upper lip hooded and laterally compressed, lower lip flat and 3-lobed; stamens 4, attached to the corolla, usually in two pairs, one longer than the other; ovary superior.
Fruits: A group of 4 1-seeded nutlets.
Habitat: Cultivated ground.Distribution: Very rare on limestone, occasional and locally frequent elsewhere.
Native status: Native
Of conservation interest: No