Swaziland's Alien Plants Database

Ageratum conyzoides L.
tropic ageratum, goat weed, billygoat weed, tropical whiteweed, blue top
Disturbed areas, Minor problem species
Origin: Tropical America
Growth Form: Herb
Plant Description: Plant: Softly hairy, slightly aromatic, annual herb with fluffy flowerheads; stems green, purplish or reddish, 0.31.0 (1.5) m high. Leaves: Bright green, ovate, in opposite pairs, margins shallowly toothed or scalloped. Flowers: Mauve, blue, pinkish or white in compact terminal flowerheads, all year; heads 45 mm across with slender, hardly exserted styles. Fruit: Brown, one-seeded achenes.
Key Features:
Control: cultivate and pre-emergence herbicides
More information:
Weeds & Invasive Plants Home Page

Photo - flowers/leaves

K Braun, Swaziland's Alien Plants Database

Photo - plant

K Braun, Swaziland's Alien Plants Database

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