L., Sp. Pl. 2:870 (1753).
Synonymy: Not Applicable
Common name: Ragwort.
Biennial subshrub, with a short thick rootstock, sparsely to densely cottony, glabrescent on the oldest parts; stem erect, stout, striate, often purplish-red, branching above the middle; basal leaves petiolate, lyrate, to 20 cm long, withering early; mid-stem leaves oblong-ovate, 8-15 x 3-4 cm, pinnatisect, the lobes irregularly toothed or lobed, sessile, stem-clasping.
Inflorescence a congested corymbose panicle of numerous capitula; involucre campanulate, 4-5 x 3.5-4 mm, bracts 11-13, abruptly narrowed c. 1 mm below the ciliolate apices; calyculus of 3-5 finely tapered bracteoles; ray florets 10-15; ligules of small heads c. 4 x 1.5 mm, of larger heads 6-10 x 1-1.8 mm; disk florets c. 40.
Achenes 1.8-2 mm long, plump, brown, those of the ray florets glabrous, those of the disk florets with short appressed hairs; pappus uniform, deciduous.
Lamp & Collett (1976) Field guide to weeds in Australia, p. 284.
Occurs in pasturages, along roadsides, and in dry sclerophyll woodlands.
S.Aust.: SL. Vic.; Tas. New Zealand, United States (California); native of Europe, widely adventive.
Flowering time: Dec. — May.
SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia
Apparently first collected in South Australia in 1954, but present in Tasmania as early as 1919 and widespread over much of the island. A noxious weed poisonous to livestock by cumulative liver damage.
Not yet available