Citation: J. Black, Trans. R. Soc. S. Aust. 52:229 (1928).

Synonymy: Not Applicable

Common name: None

Description:
Small-flowered daisy-bush. Compact shrub to 1.5 m high; stems erect, woody, much-branched, finely pubescent, without ribs; leaves sessile, approximate and sometimes overlapping, upcurved to appressed, oblong, with a prominently obtuse base, 1.5-2.5 mm long, c. 1 mm wide, thickened, glabrous above, tomentose below without prominent veins; margin entire, revolute.

Capitula solitary, sessile, terminal on erect branchlets sometimes forming a very loose leafy panicle; involucre cylindrical, c. 3 mm long; bracts 2-seriate, oblong, obtuse, ciliate at the apex; ray florets 2-5; ligules oblong, c. 3 mm long, white; disk florets 2 or 3 rarely 4, yellow.

Achenes terete, 1-1.5 mm long, striate, pubescent; pappus bristles 25-35, c. 2 mm long, subequal.

Distribution:  Mainly in mallee, also in broombush and woodland, on various soils. S.Aust.: KI. Conservation status: native Flowering time: most of the year.

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

Biology: No text

Taxonomic notes: O. microdisca as here circumscribed is endemic to KI. 'Black's type material at AD comprises disparate elements; those from Ardrossan and Maitland, Yorke Peninsula, are referrable to O. floribunda. The portion of the collection from White Lagoon, Kangaroo Island, 23.i.1883, J.G.O. Tepper s.n. mounted on a sheet of Black's sketches and notes is here designated the lectotype; the other sheet (AD 96307020) of this collection is an isolectotype.

Author: Not yet available