J. Black, Trans. R. Soc. S. Aust. 52:229 (1928).
Synonymy: Not Applicable
Common name: None
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.
Mainly in mallee, also in broombush and woodland, on various soils.
Flowering time: most of the year.
SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia
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.
Not yet available