Description: Perennial herbs, with branched and unbranched hairs.
Leaves with entire or dentate.
Inflorescence with flower heads solitary or corymbose. Receptacle naked or shortly fimbriate-dentate. Florets yellow or rarely reddish, greenish, or white, Style branches long with short hairs.
Achenes terete to narrowly obconical, glabrous, about 10-ribbed; ribs somewhat confluent at apex. Pappus in one or two rows of scabrid-barbellate, persistent but fragile, slender bristles.
Distribution and occurrence: Mainly Europe and Temperate Asia, also in North and South America and Africa (especially mountains), ca. 90 species. NSW: 3 species naturalised, also naturalised in Victoria.
Hawkweeds are highly invasive plants and are a major threat to biodiversity, conservation areas and native grasslands. HAWKWEEDS ARE DECLARED NOXIOUS and must be continuously suppressed and destroyed. If you find hawkweed or something similar in your area, contact your Council Weeds Officer or NSW Department of Primary Industries immediately.
Text by Lawrence Mou; Louisa Murray
Taxon concept: Bremer, K. (1994)
| ||Key to the species|| |
|1||Plants with or without stolons; stems erect, not stiff with stem leaves absent or much reduced; inflorescence solitary or in a cluster||2|
|Plants without stolons; stems erect and stiff and leafy; inflorescence an open round-topped cluster||Hieracium murorum|
|2||Flowers orange to red in an open round cluster; basal leaves with numerous simple hairs on upper surface and simple and stellate hairs on the lower surface||Hieracium aurantiacum |
|Flowers yellow, sometimes with red stripes, solitary on a leafless stem; basal leaves with upper surface dark green with numerous long simple hairs, lower surface whitish from a dense mat of stellate hairs|
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