Onopordum nervosum subsp. castellanum G.Gonzalez Sierra, Perez Morales, Penas & Rivas.Mart.

Cotton Thistle

Candollea 47: 191 (1992)

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Sparingly established

Erect biennial to 2.5 m high; stems winged and ribbed, yellowish-brown, woolly; wings to 20 mm wide, with spines to 12 mm long on the lobes. Leaves sessile, oblong-lanceolate in outline to 50 cm long, 20 cm wide, pinnatifid with 6–8 pairs of remote triangular lobes, each tipped by a yellowish spine, both surfaces grey-green and woolly. Capitula shortly pedunculate, solitary or in clusters of 2 or 3 at the ends of stems, conical-ovoid, 3.5–5 cm diam.; involucral bracts lanceolate, to 4 cm long, grey-green near base becoming purple towards apex, all erect, tapered into a yellow spinose apical appendage, outer involucral bracts cobwebbed. Florets longer than involucre, purple or pink. Cypselas 4–5 mm long, 4-ribbed, wrinkled, grey; pappus 8–10 mm long, white, silky. Flowers summer.

*Gold, *VVP. Known in Australia from two collections in central Victoria.

The Victorian material is assigned to subsp. castellanum by the woolly tomentum on all vegetative parts.

Created by: Daniel Ohlsen, 2015-07-24
Updated by: Daniel Ohlsen, 2017-11-03
Distribution map

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Onopordum nervosum subsp. castellanum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Onopordum nervosum subsp. castellanum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Victorian Volcanic Plain present introduced
Goldfields present introduced