Australian Tropical Rainforest Plants - Online edition

Polyosma alangiacea F.Muell.

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Fruit, four views, cross section and seed. © W. T. Cooper
Scale bar 10mm. © CSIRO
Cotyledon stage, epigeal germination. © CSIRO
10th leaf stage. © CSIRO

Mueller, F.J.H. von (1874) Fragmenta Phytographiae Australiae 8: 8. Type: In silvis densis montium prope Rockinghams Bay ubi, quoque Bischoffia Javanica nascitur; Dallachy.

Common name

Alder, White; White Alder


Fine oak grain in the wood and a corresponding pattern in the inner blaze. Lenticels quite large, up to 20 cm or longer on trees 30 cm dbh. White granular stripes in the outer blaze under the lenticels.


Young shoots and younger leaf bearing twigs densely clothed in short brown hairs. Leaf blades about 6.5-16 x 2.5-6 cm. Lateral veins forming loops inside the blade margin.


Calyx rusty pubescent on the outer surface, lobes about 0.5-1 mm long. Corolla rusty pubescent on the outer surface, about 10-11 mm long. Staminal filaments about 5-6 mm long. Style about 9-10 mm long, stigma +/- peltate.


Fruits globular, about 13-15 x 11-15 mm. Seeds about 10 x 7 mm, rostrate at the apex.


Cotyledons linear-elliptic, base sessile. First pair of leaves toothed. At the tenth leaf stage: leaf blade obovate, apex acuminate, base cuneate, margin dentate, teeth aristate, about 1-3 on each margin of the blade, upper surface glabrous; petiole, stem and terminal bud clothed in reddish brown hairs. Seed germination time 259 to 456 days.

Distribution and Ecology

Endemic to Queensland, occurs in NEQ and CEQ. Altitudinal range in NEQ from 700-1200 m. Grows in well developed upland and mountain rain forest.

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