Erect shrub 0.6-3 m tall. Bark smooth, compact. Hairs of moderate length, appressed to antrorse, greyish to mid-brown. Young branchlets moderately to densely hairy. Leaves not twisted, linear, mostly 6-13 cm long, 0.7-1.7 mm wide, prominently convex when fresh, with revolute margins when dried, with obscure venation, often sinuate, mostly spreading to suberect, not pungent, concolorous, green, sparsely to densely hairy when immature, glabrescent, smooth. Inflorescence 1-4-flowered; rachis to 10 mm long. Pedicels 2-5 mm long. Tepals 8-12 mm long, bright yellow, acute, moderately hairy. Anthers bright yellow; appendage 0.6-1 mm long. Gynoecium 7.5-9.5 mm long. Pyrene compressed-ellipsoidal, 4-4.5 mm long, c. 2.5 mm wide.
Occurs within 50 km of the coast, from Margaret River to Albany, south-western W.A.
Grows in peaty, poorly drained sand, surrounding bogs or creeks, usually in thicket or swamp-heath communites dominated by sedges and Myrtaceous shrubs; in small populations.
W.A.: Scott R., E.Wittwer 2256 (PERTH); 11.1 km S of Northcliffe, on road to Windy Harbour, P.H.Weston 218 (SYD); 16 km NW of Mt Manypeaks, K.Newbey 2736 (PERTH).
Author - P.H.Weston
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Acknowledgements -
Cite this profile as: P.H.Weston. Acidonia microcarpa, in (ed.), Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. https://profiles.ala.org.au/opus/foa/profile/Acidonia%20microcarpa [Date Accessed: 15 March 2025]