Thickhead
Crassocephalum crepidioides, Fam. Asteraceae
Erect, annual herb to 1m with a ribbed stem.
| Weed Category: |
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.
|
| Weed: | Yes |
| Form or habit: | Herb |
| Family: | Asteraceae |
| Leaf: | Simple Alternate Simple, alternate with coarsely toothed margins, elliptic to ovate in outline, up to 200 x 100mm with stalks to 40mm long; upper leaves smaller, usually elliptical; lower leaves larger with a pair of lobes close to base. |
| Flower conspicuous: | Conspicuous |
| Flower colour: |
Pink, Orange |
| Flower description: | Orange to orange-pink, fluffy heads borne on slender stems in drooping groups, becoming erect as ‘seeds’ develop. |
| Fruit conspicuous: | Inconspicuous |
| Fruit colour: |
Brown |
| Fruit: | |
| Fruit description: | Numerous small brown ribbed ‘seeds’, each with many fine hairs attached to the top. |
| Habitat: | |
| Distribution | |
| Food source for: | |
| Toxicity: | No toxicity known |
| Origin: | Africa and Madagascar |
| Notes: | Spread by: seeds by wind and water; contact with the ground results in pieces of stem taking root. Invades/threats: roadsides and disturbed areas. Environmental weed. |
| Information sources: | Mackay Regional Pest Management Group (2018) Weeds of the Mackay Whitsunday Region Second Edition. |
