Common name: Blue Weed
Helianthus ciliaris DC. APNI*
Description: Creeping perennial herb up to 50 cm high.
Leaves linear to broad-lanceolate, 2–5 cm long, 5–10 mm wide, margins entire to pinnate, margins sometimes ciliate and recurved, lamina glabrous, distinctly 3-veined when lanceolate.
Heads single or in groups of 3 or 4; heads 1.5–2.5 cm diam.; involucral bracts ovate to broad-lanceolate, obtuse, ciliate, otherwise glabrous or with a few hairs; receptacle scales often with 0–3 teeth at apex, margins ciliate. Ray florets yellow; ligules c. 1 cm long. Disc florets yellow with reddish purplish lobes.
Achenes c. 3 mm long, black or greyish at maturity.
Distribution and occurrence: Weed of cultivation and roadsides; south from Warialda district. Native of C Amer.
NSW subdivisions: *NWS, *CWS, *SWS
Other Australian states: *Qld *Vic. *S.A.
Declared Noxious Weed
Text by L. Murray
Taxon concept: Flora of NSW 3 (1992)
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.