Acacias of Australia

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Acacia resinicostata Pedley




Disjunct, occurring in the Carnarvon Ra. and c. 300 km to the SE near Djuan and Karara, south-eastern Qld.


Bushy, rounded shrub 2–3 m high, glabrous, somewhat resinous. Branchlet ribs somewhat tuberculate. Phyllodes scattered or irregularly verticillate, rather crowded, ±sessile, patent to inclined, linear to narrowly oblong, straight or incurved, flat, 5–10 (–15) mm long, 0.5–1 mm wide, abruptly constricted at base, obliquely and excentrically mucronulate to rostellate, sometimes uncinate, somewhat thick, longitudinally rugulose when dry, light green; midrib often obscure; gland minute, basal, sometimes absent. Inflorescences simple, 1 per axil; peduncles (5–) 7–12 mm long, ebracteate at base; heads globular, 25–35-flowered, deep lemon yellow. Flowers 5-merous; sepals 2/3–3/4-united, with acute lobes. Pods narrowly oblong, to 8 cm long, 4–6 mm wide, firmly chartaceous, subvernicose; stipe 3–5 mm long. Seeds longitudinal, oblong-elliptic, 4–4.5 mm long; aril clavate, cream.


Grows in shallow soil in dissected sandstone country in open woodland.


Qld: Emu Ck Rd, running NE from Cooyar–Crows Nest road and following Emu Ck, 2 km from turn-off, L.W.Jessup & B.A.Lebler 139 (BRI); top of Boolimba Bluff, Carnarvon Natl Park, J.Neldner & M.B.Thomas 901 (BRI); Gore, 40 km ENE of Inglewood, G.Ward 329 (BRI).


Specimens from Boolimba Bluff in the Carnarvon Ra. have longer phyllodes than elsewhere (i.e. to 20 mm long).

A member of the ‘A. johnsonii group’ and distinguished by its truncate, ±sessile phyllode bases, i.e. pulvinus extremely reduced. The entity from Blackdown Tableland referred to under to under A. resinicostata by B.R.Maslin, Fl. Australia 11A: 456 (2001) are now described as A. hendersonii.

FOA Reference

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


Minor edits by B.R.Maslin