Acacias of Australia

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Acacia islana Pedley




Restricted to the Isla Gorge area (c 50 km SSW of Theodore), Qld.


Spindly, open shrub 2–4 m high, glabrous, slightly resinous. Branchlets ±tuberculate-ribbed. Phyllodes scattered, some clustered in twos or threes, patent to inclined, slender, incurved, terete to subterete, drying with a longitudinal groove on each face along the midline, (0.6–) 1–2 cm long, 0.3–0.5 (–1) mm wide, abruptly constricted to a pulvinus c. 0.2 mm long, excentrically mucronulate to rostellate, green, nerveless; gland minute, c. 0.5 mm above pulvinus. Inflorescences simple, 1 per axil; peduncles 7–16 mm long, ebracteate at base; heads globular, 20–30-flowered, light golden. Flowers 5-merous; sepals 2/3–4/5-united. Pods linear, to 6 cm long, 3–4 mm wide, firmly chartaceous. Seeds longitudinal, oblong, 4–4.5 mm long; aril oblique.


Grows in Eucalyptus woodland on shallow, stony soil over sandstone.


Qld: 6.4 km S of Gorge Ck on Theodore–Taroom road in Isla Natl Park area, K.A.W.Williams 76026 (BRI).


A member of the ‘A. johnsonii group’, most closely related to A. burbidgeae which has sparsely to moderately hairy branchlets and longer, subterete phyllodes. Sometimes sympatric with A. hockingsii, another member of the group restricted to the Isla Gorge area.

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 J.Rogers