Weed Identification

Australia > > Austroeupatorium


Austroeupatorium inulaefolium

IMPORTANT: IF YOU SUSPECT THE PRESENCE OF THIS PLANT, PLEASE REPORT IT BY CALLING 1800 084 881 (local call cost anywhere in Australia).

Family: Asteraceae.

Form: Shrub

Origin: Native of Central and South America and the Caribbean Islands.

Flowers/Seedhead: In heads 23 mm wide containing 815 fragrant small flowers (florets). Flowers most of year.

Description: Scrambling shrub to 5 m high. Stems with dense covering of short hairs. Leaves 718 cm long, 2.58 cm wide, spear-shaped (lanceolate), hairy, margins toothed, on a stalk. Seed ribbed, to 1.5mm long, apex with numerous white bristles about 4 mm long.

Distinguishing features: Distinguished by opposite leaves that are on a stalk; flowerheads in terminal panicles, each head to3 mm wide; bracts surrounding flowerheads (involucral bracts) in 3 or 4 rows; cream tubular florets to 5mm long arising from a hairless receptacle and surrounded by hairlike bristles about as long as the florets.

Dispersal: Spread by wind-dispersed seed.

White flower clusters & spearshaped
opposite leaves
photos A.A.Mitchell & C.Wilson

Notes: Forms dense thickets in its introduced range. Weed of disturbed forest, plantations, perennial crops and roadsides in the Philippines, Indonesia, southeast Asia and Sri Lanka.


    Northern Australia Quarantine Strategy Weeds Target List. B. Waterhouse and A. Mitchell. 1998, AQIS Miscellaneous Publication 6/98, pages 2122.

Maturing flowerheads

Mature flowerheads

Dense thickets crowd out other plants

This weed has been included in the WEEDeck field guide as card S21

More information about WEEDeck is available from Sainty & Associates Pty. Ltd.


Australia > > Austroeupatorium


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