Belcher, Ann. Miss. Bot. Gard. 43:43 (1956).
Synonymy: S. flaccidus sensu A. Rich. Voy. l'Astrolabe 2:110 (1834), non Less.; Erechtites sonchoides sensu DC., Prod. 6:296 (1838), non S. sonchoides Kunth; E. prenanthoides sensu J. Black, Fl.S. Aust. 609 (1929), non DC.
, Senecio minimus
Common name: Jagged fireweed, groundsel.
Erect subglabrous annual herb, 60-100 cm high; stems stout, striate, branched mainly at the inflorescence, generally glabrous, minutely hispid basally; leaves thin, sometimes membranous, broadly lanceolate or ovate, 6-14 x 2.5-5 cm, irregularly biserrate with primary teeth cut in halfway to the midrib, the teeth directed forward, sessile with lacerate auricles, glabrous or with a few long hairs along the veins.
Inflorescence a rather dense terminal corymbose panicle of 100-400 capitula; peduncles 5-8 mm long; involucre 6.5-7 x 2-3 mm, glabrous; calyculus of 2-5 narrowly triangular appressed bracteoles 0.8-1.3 mm long; bracts 7-9; female florets 12-17, 3- or 4-lobed; bisexual florets 6-8, 5-lobed.
Achenes subcylindrical, 2-3 x 0.3-0.4 mm, with 8-10 rounded ribs; hairs short, appressed or spreading, in channels between the ribs, those of the female florets olivegreen, those of the bisexual florets dark-brown; pappus deciduous, dimorphic.
Most frequent in areas of more than 600 mm rainfall, usually near the coast in wet sclerophyll forests on clay or sandy clay, or near beaches on coastal sand; less frequent inland.
S.Aust.: SE. N.S.W.; Vic.; Tas. New Zealand.
Flowering time: Oct. — March.
SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia
Not yet available