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Scale bar 10mm. Copyright CSIRO
Cotyledon stage, epigeal germination. Copyright CSIRO
10th leaf stage. Copyright CSIRO
Leaves and dehisced fruits. Copyright CSIRO
Leaves and Flowers. Copyright CSIRO
Acacia auriculiformis A.Cunn. ex Benth.
Bentham, G. (1842) The London Journal of Botany 1: 377. Type: Goulburn and Sims Islands, N. Coast, Cunningham..
Racosperma auriculiforme (Benth.) Pedley, Botanical Journal of the Linnean Society 92: 247(1986), Type: ?.
Leaves phyllodineous. Veins longitudinal, +/- parallel, anastomosing, about 3-5 veins somewhat thicker than the rest; marginal glands not obvious. Leaf blades about 10-16 x 1.5-2.5 cm. Petiole swollen, transversely wrinkled.
Spikes yellow, up to 8 cm long, somewhat interrupted, flowers sparsely distributed in pairs in the upper axils. Calyx glabrous, about 0.7-1 mm long, shortly lobed. Corolla about 1.7-2 mm long, about 2-2.5 times as long as the calyx. Stamens about 3 mm long. Ovary densely pubescent.
Cotyledons oblong, elliptic or obovate, about 5-8 mm long. First leaf pinnate, second leaf bipinnate. By the third or fourth leaf stage: leaves bipinnate, petiole broadly flattened. At the tenth leaf stage: leaves phyllodineous, linear, glabrous, usually with two main veins running from the base to the apex; stipules very small, triangular, visible with a lens but falling early.
Distribution and Ecology
Occurs in WA (near the border with NT), NT, CYP and NEQ (as far south as Mt Molloy). Altitudinal range from near sea level to 500 m. Grows in rain forest but more frequently found in gallery forest or growing as a rheophyte along the creeks and rivers of Cape York Peninsula. Also occurs in New Guinea and Kai Island and perhaps other islands in eastern Malesia.
Shrub (woody or herbaceous, 1-6 m tall)