Citation: J. Black, Trans. R. Soc. S. Aust. 52:230 (1928).

Synonymy: non S. lautus Sol. var. lanceolatus Benth. which is a form of S. lautus from Vic.

Common name: Groundsel.

Description:
Perennial glabrous herb or undershrub to 1.5 m high; leaves lanceolate or oblong, 4-8 x 1.5-3 cm, lower ones pinnatifid with broad lobes, upper ones dentate, all sessile and clasping.

Inflorescence a rather lax corymbose panicle of few to many heads, sometimes irregular, involucre cylindrical, 5-7 x 2-3 mm; bracts 11-14; calyculus of 5-7 appressed slender bracteoles; ray florets 4-10; ligules small, 2.5-4 x c. 1 mm, usually recurved disk florets c. 25, sterile, pollen abortive.

Achene pubescent, white or straw-coloured and shrivelled.

Distribution:  An uncommon plant often near the margins of swamps or lakes.   Vic. Conservation status: native Flowering time: Sept. — Dec.

SA Distribution Map based on current data relating to specimens held in the State Herbarium of South Australia

Biology: Studies of pollen fertility, chromosome number and karyotypes have shown that this 'species' is a sterile hybrid, most probably with S. lautus (2n = 40) and S. biserratus (2n = 100) as parent species. S. xorarius has 2n = 70 chromosomes, and all field and herbarium collections examined are quite sterile.

Author: Not yet available