Crofton Weed

Ageratina adenophora Crofton weed

DESCRIPTION

Leafy perennial shrub 1-2m tall covered in glandular and simple hairs. Soft triangular to rhombic leaves 4-12cm long by 3-9cm wide with distinct venation and lightly toothed margins. Petioles up to 4cm long.

FLOWERS AND FRUIT

Corymbose heads of numerous white flowers during spring. Glabrous five-angled achenes 1-2mm long. Ageratina from Ageratum, a reference to some blue- flowered species in this genus.

HABITAT AND RANGE

Disturbed moist sites including forest edges, rainforest margins, roadsides and gullies, with most populations congregating near Brisbane/ Sydney. A native of Central America.