Sieber ex Schultz-Bip., Flora 28:498 (1845).
Synonymy: Erechtites tenuiflora DC., Prod. 6:296 (1838); S. apargiaefolius Walp., Linnaea 14:309 (1840); E. apargiaefolius (Walp.) Sonder, Linnaea 25:524 (1853); S. hispidulus x quadridentatus: Belcher, Ann. Miss. Bot. Gard. 43:71 (1956), partly.
Common name: None
Erect or ascending annual or biennial herb, 30-60 rarely 100 cm high; branches basal or only in the inflorescence; root system fibrous, often fleshy; lower leaves crowded, obovate to oblanceolate, 4-10 x 1-2.5 cm, obtuse, denticulate to serrulate, subpetiolate above a shortly clasping base, moderately to densely hispid beneath, with multicellular tapering hairs terminating in long filaments, cobwebby to somewhat scabrous above; mid-stem leaves similar, shorter, lanceolate.
Inflorescence laxly corymbose-paniculate, of 20-40 capitula; peduncles 15-25 mm long, cottony; involucres narrowly cylindrical, 7.5-9 x 2-3.5 mm; bracts 9-13; calyculus of 3-5 narrowly triangular bracteoles; female florets 14-40, 3- or 4-lobed; bisexual florets 8-15, 5-lobed.
Achene 2.2-2.5 x 0.5-0.6 mm, plump, not at all attenuate-rostrate apically, red-brown, minutely hairy in the narrow grooves, ribs flat, not prominent; pappus deciduous, dimorphic.
In disturbed areas, on roadsides, and in open woodlands; on sandy and sandy clay soils in moist settings, often accompanying S. quadridentatus.
W.Aust.; Qld; N.S.W.; Vic.; Tas.
Flowering time: Oct. — Jan.
SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia
Resembles S. quadridentatus (fig. 727H) in habit. Positively distinguished by characters of the achenes, and by the involucral bracts typically each with a single (sometimes dual) prominent vein and few or no minor ones (visible only after the use of a clearing agent such as lactic acid).
Not yet available