Common name: Caustic Weed, Spurgewort, Balsam, Creeping Caustic, Mat Spurge, Flat Spurge, Milkweed, Caustic Creeper
Euphorbia drummondii Boiss. APNI* Synonyms: Chamaesyce drummondii (Boiss.) D.C.Hassall APNI*
Description: Perennial herb with prostrate, ascending or decumbent stems mostly to 20 cm long, glabrous; at length woody at base with a thick or woody rhizome.
Leaves circular, ovate or oblong, 2–10 mm long, 1.5–5 mm wide, margins entire or finely toothed, base asymmetric; petiole to 1 mm long; stipules free or interpetiolar.
Cyathia as in preceding species.
Capsule without a fringed receptacle appendage at base.
Distribution and occurrence: Widespread, usually grows in drier sites than E. dallachyana.
NSW subdivisions: NC, CC, SC, NT, CT, ST, NWS, CWS, SWS, NWP, SWP, NFWP, SFWP
Other Australian states: Qld N.T. W.A.
A widespread and variable species. Several distinct taxa may be recognized and these may be published as subspecies. One taxon collected from Mt Kaputar N.P. has conspicuous lobed appendages.
Text by T.A. James & G.J. Harden, as Chamaesyce drummondii in Flora of NSW 1 (1990)
Taxon concept: Halford, D.A. & Harris, W.K. (2012), A taxonomic revision of Euphorbia section Anisophyllum Roeper (Euphorbiaceae) in Australia. Austrobaileya 8(4): 484-485; accepted by APC (accessed January 2017)
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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