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Electronic Flora of South Australia
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Electronic Flora of South Australia species Fact Sheet

Family: Euphorbiaceae
Euphorbia mitchelliana

Citation: Boiss. in A. DC., Prod. 15, 2:25 (1866) var. mitchelliana.

Synonymy: Chamaesyce mitchelliana (Boiss.)Hassall, Aust. J. Bot. 24:640 (1976).

Common name: None

Virgate glabrous subshrub, branches to 50 cm high, greenish or reddish, erect or diffuse, the ultimate branches filiform; leaves opposite, shortly petiolate, the lower ones ovate, the upper oblong to linear, 10-35 x 3-5 mm, asymmetrical at the base, nearly entire to serrulate, texture somewhat coriaceous; stipules filiform, to 0.5 mm long, caducous.

Cyathia shortly peduncullate in rather loose irregular cymes, axillary or terminal on upper branchlets; ray- and raylet-leaves linear, mostly as long as or longer than the cyathia; involucre 0.5-1.2 mm long; glands bordered by a petal-like obovate or orbicular appendage, sometimes deeply cut and 0.5-1 mm in breadth.

Capsule 3-lobed, c. 2.25 mm broad, green to light-brown, smooth; styles ascending, divided nearly to the base; seed angular-oblong, 1.2-1.9 x 0.6-0.9 mm, with 4 longitudinal ribs, distinctly transversely rugose, white or brown-black.

image of FSA2_Euphorbia_mit.jpg Euphorbia mitchelliana var. mitchelliana twig, cyathium, fruit and seed.
Image source: fig 402a in Jessop J.P. & Toelken H.R. (Ed.) 1986. Flora of South Australia (4th edn).

Published illustration: Banks & Solander (1905) Bot. Cook's Voy. 3:t. 282.

Distribution:    W.Aust.; N.T.; Qld.

Conservation status: native

Flowering time: Feb. — Aug.

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

Biology: No text

Taxonomic notes: A single specimen in AD was most likely collected towards the end of the 19th century, with the vague location written on the label "Lake Eyre". The specimen resembles in habit E. coghlanii, in which the seeds are smooth, but this specimen has the seeds typical of E. mitchelliana.

Author: Not yet available

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