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 Ageratum conyzoides L.

Synonym	:	Ageratum conyzoides var. pilosum Blume
Family	:	ASTERACEAE
Local name	:	Malayalam-  Kattappa English-.White weed
Flowering and fruiting period	:	August-December
Distribution	:	Pantropical
Distribution in kerala	:	All Districts
Habitat	:	Weed in fallow fields and wastelands
Uses	:	Ageratum conyzoides is widely used by many traditional cultures, against dysentery and diarrhea. It is also an insecticide and nematicide.
Key Botanical Characters : Herbs, viscid hairy. Leaves simple, opposite, 5-7 x 3-5 cm, ovate, apex acute, crenate, base rounded; petiole 1-3 cm long. Heads white, to 7 mm across, in terminal corymbose panicle; bracts 1-3-seriate, 3-4 mm long, elliptic, toothed at apex, 3-ribbed. Flowers all similar, bisexual. Corolla 2.5 mm long, tubular, white, glabrous, 5-lobed at apex. Stamens 5, anthers linear. Achenes 2 mm long, linear, 5-angled, hirsute along the angles; pappus 3-4 mm long, many, setaceous.