Acacias of Australia

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Acacia ayersiana Maconochie x Acacia incurvaneura Maslin & J.E.Reid




Large shrubs. Branchlets with moderately thick, transversely segmented opaque-resinous ribs towards apices, the resin absent or vestigial on older branchlets. New shoots resinous, the resin opaque. Phyllodes very narrowly elliptic, (4.5–) 5–8 (–11) cm long, 3–4 mm wide, shallowly recurved, discrete marginal nerve resinous. Flowers and pods not seen.


Acacia ayersiana x incurvaneura is similar to A. ayersiana (hybrid) in having narrow phyllodes (3–4 mm wide) with well-developed resinous margins but is most reliably distinguished by the opaque resin which occurs on the expanding phyllodes of the new shoots. Opaque resin is normal for A. incurvaneura but never occurs in A. ayersiana (which, when resinous, has translucent resin). Also, the phyllodes of A. aneura x incurvaneura are shallowly recurved; in A. ayersiana (hybrid) the phyllodes are normally shallowly incurved, only rarely shallowly recurved.


Known from only two sterile specimens from the Pilbara region (central Hamersley Range near West Angelas), namely, M.E. Trudgen 17613 and 17615.


The specimen, B.R. Maslin et al. BRM 9270, that was cited in B.R.Maslin & J.E.Reid, Nuytsia 22: 189 (2012) is now regarded as A. ayersiana (hybrid).

This seemingly rare entity is noted in B.R.Maslin & J.E.Reid, Nuytsia 22: 189 (2012).

FOA Reference

Flora of Australia Project