Acanthospermum hispidum, Fam. Asteraceae
Upright annual herb 45-90cm, covered with coarse hairs, stems repeatedly forked.
Other invasive plants
Invasive plants that are not prohibited or restricted invasive plants, but are known to spread readily and cause negative impacts, within the region.
|Form or habit:||Herb|
Opposite, yellowish-green, 25-50mm long, elliptic or ovate, hairy on both surfaces, either stalkless or with a winged stalk-like base up to 10mm long, toothed margins.
|Flower description:||Solitary green heads, 4-5mm wide, borne in leaf axils and forks of stem.|
|Fruit description:||Heads of 5-10 wedge-shaped ‘seeds’ radiating from centre forming a star-like burr. Green turning brown on maturity. Mature ‘seeds’ 6mm long, covered with short, hooked spines and with two stouter divergent spines, 3-4mm long, at the tip.|
|Food source for:|
|Toxicity:||Toxic or irritant to domestic pets|
|Notes:||Prickly ‘seeds’ adhere to ‘everything’, probably also water borne. Invades disturbed land and alluvial flats, will out-grow young cane. Occasionally seen on coastal dunes in this district.|
|Information sources:||Mackay Regional Pest Management Group (2018) Weeds of the Mackay Whitsunday Region Second Edition.|