Acacias of Australia

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Acacia jackesiana Pedley




Known only from the type locality in north-eastern Qld.


Shrub to 1 m high, prostrate. Branchlets slightly angular, red-brown, resinous towards apices, squamulose. Phyllodes tetragonous-terete, sometimes flat in section, 9–22 cm long, 0.8–1.6 mm wide, glabrous, squamulose, with 1 strong nerve at each angle and 1 or 2 less obvious median nerves on abaxial and adaxial faces, with 8 or 12 nerves in all, with 2 or 3 prominently raised nerves per face when flat; gland 1, basal, small. Spikes 1.2–2.2 cm long, golden. Peduncles 2–13 mm long, glabrous. Flowers 5-merous, rarely 6-merous, widely spaced; calyx 0.6–0.9 mm long, dissected for 1/4–1/3, squamulose; corolla 1.7–2.5 mm long, dissected for 2/3–3/5, glabrous; ovary glabrous. Pods linear, tapered at both ends, scarcely moniliform, flat (old valves tightly coiled), 6–10.5 cm long, 5–8 mm wide, subwoody, reticulate, glabrous; margins fawn, prominent. Seeds longitudinal, elliptic, 4.8–5.4 mm long, light brown; pleurogram thin, closed, with wide halo; areole paler brown.


Flowers July. and Oct.


Grows in brown loam, over Argentine schist, in open eucalypt woodland.


Qld: near Argentine Mine, N.Hall 82/13 & E.M.Jackes (NSW).


Closely related to A. guymeri which has consistently flat phyllodes with less prominently raised nerves and paler coloured spikes.

FOA Reference

Data derived from Flora of Australia Volumes 11A (2001), 11B (2001) and 12 (1998), products of ABRS, ©Commonwealth of Australia


Dr M.D.Tindale and Dr P.G.Kodela with the assistance of M.Bedward, S.J.Davies, C.Herscovitch, D.A.Keith and/or D.A.Morrison

Minor edits by B.R.Maslin & J.Rogers