Common Hemp-nettle

(Galeopsis tetrahit L.) Fam:. Lamiaceae

Danmark Almindelig Hanekro, Estland Kare kõrvik, Finland Karheapillike, HollandGewone hennepnetel, Island Garðahjálmgras , Lettland Parastais aklis, Litauien Dirvine akle, Norge Kvassdå, Polen Poziewnik szorstki, Ryssland Пикульник обыкновенный, Tyskland Acker-Hohlzahn, Storbrittanien Pipdån

Cotyledons 10-15 mm long and 8-10 mm broad, long-petioled, obovate with two backward-directed lobes. True leaves 25-100 mm, ovate to ovate-lanceolate, narrowing gradually to a point, coarsely saw-toothed, softly hairy. Stems 20-80 cm, 4-angled, sharply bristly, branched, slightly swollen at  nodes or below, occasionally red-tipped glandular hairs below nodes. Flowers in terminal spikes and dense clusters in the apper leaf axils. Corolla purple, sometimes pink or white, two-lipped. Reproduces only by seed (fruit with 4 seeds) and germinate generally very quickly in the spring. Site: occurs as weed in all kinds of arable crops and in vegetable gardens, particularly nitrogenous soils (peat soils and humic mineral soils). Summer annual.