Euphorbia multifaria
Halford & W.K.HarrisProstrate annual or perennial herb with thickened rootstock, glabrous; stems to c. 10 cm long, not rooting at nodes. Leaves opposite, oblong, oblong-ovate or elliptic, 2–7 mm long, 1.5–4 mm wide, 1.8–1.9 times wider than long, aadaxial surface dull light blue-green often with reddish patches along the midline, smooth (rarely papillose), apex rounded, base asymmetric, margins minutely toothed; petioles 0.2–0.6 mm long; stipules not or only shortly united between petioles, triangular, 0.3–1 mm long, margins deeply laciniate, the stipules often appearing digitate. Cyathia solitary in uppermost axils or terminal on short branchlets; peduncles 0.3–0.4 mm long; involucre campanulate or turbinate, 0.5–0.6 mm long; glands cupuliform, 0.1–0.3 mm long, 0.2–0.4 mm wide, red; gland appendages vestigial, <0.1 mm long, c. 0.1 mm wide, pink; female flowers with styles entire to scarcely bifid or bifid for 1/3–1/2 of their length. Capsule subglobose, 1.5–2.1 mm diam., obtusely keeled, smooth or rarely minutely papillose, glabrous; seeds quadrangular-oblong, 1–1.5 mm long, 0.7–0.8 mm tangentially, 0.6–0.7 mm radially, smooth, faintly ridged, grey, white or pale brown, caruncle absent. Flowers throughout the year.
MuM, MSB, RobP. Also WA, SA. Known from a few collections in the far north-west (Annuello, Hattah, Benetook areas), on disturbed ground and receding lake margins.
Previously included in Euphorbia drummondii in Victoria but differing from that species in having smooth or only faintly ridged seeds. E. drummondii occurs in WA, NT, Qld and northern NSW. Can be confused with E. dallachyana and E. serpens, for differences see key.
Halford, D.A.; Harris, W.K. (2012). A taxonomic revision of Euphorbia section Anisophyllum Roeper (Euphorbiaceae) in Australia. Austrobaileya 8(4): 481-484. Austrobaileya 8(4): 441–600.