Crofton weed

Crofton weed

Ageratina adenophora (Asteraceae)

Common Name:

Crofton weed

Scientific Name:

Ageratina adenophora (Asteraceae)


Alternative common names:

Mexican devil; snake root

Description:

Perennial or shrub up to 2m high with hairy stems. Dark green, non-aromatic leaves 30-60mm wide. White flowers in terminal clusters from August to December. This plant is poisonous. 

Additional Information


Where does this species come from?

Central America

What is its invasive status in South Africa?

CARA 2002 - Category 1 NEMBA 2020 - Category 1b

Where does this species come from?

Central America

Where in South Africa is it a problem?

Western Cape, KwaZulu-Natal, Gauteng and Limpopo Provinces.

How does it spread?

Seed dispersal

Why is it a problem?

Competes with and replaces indigenous species, particularly along forest margins and riverbanks. This plant is also poisonous.

What does it look like?

General description: Perennial or shrub up to 2m high with hairy stems.
Leaves: Dark green, non-aromatic leaves 30-60mm wide.
Flowers: White flowers in terminal clusters from August to December.
Fruit/seeds: Straw-coloured bristly hard seed.

Does the plant have any uses?

Planted as an ornament.

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