Australian Tropical Rainforest Plants - Online edition

Austromuellera trinervia C.T.White

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Leaves, flowers and dehisced fruit. © CSIRO
Leaves and Flowers. © CSIRO
Flowers, dehisced fruit and seeds. © CSIRO
Leaves and Flowers. © CSIRO
Dehiscing fruit. © CSIRO
Scale bar 10mm. © CSIRO
Cotyledon stage, epigeal germination. © CSIRO
10th leaf stage. © CSIRO

White, C.T. (1932) Bulletin of Miscellaneous Information, Kew : 235. Type: Queensland. Boonjie, Atherton Tableland, Jan. 1923, C.T. White s.n.

Common name

Mueller's Silky Oak; Oak, Mueller's Silky


Oak grain in the wood and a corresponding pattern in the outer blaze. Outer dead bark orange-brown when cut.


Oak grain in the twigs. Terminal buds and young shoots densely clothed in rusty or orange-brown hairs. Lateral leaflets about 7.5-15 x 3-5 cm, with about 3 or 4 longitudinal veins, but the terminal leaflet possessing a midrib and lateral veins.


Racemes about 30-70 cm long. Tepals about 17-25 mm long. Hypogynous glands three, often red, turgid. Ovules 1 or 2.


Fruits about 14-21 cm long. Seeds flat, about 13-16 x 3.5-4.5 cm overall including the wing.


Cotyledons without venation. First pair of leaves with about 6-9 leaflets or lobes. Stem, petioles and terminal bud clothed in rusty hairs. At the tenth leaf stage: compound leaf with about 9-12 leaflets, leaflet blades lanceolate, glabrous, trinerved; terminal leaflet usually lobed; compound leaf clothed in rusty red hairs. Seed germination time 26 to 41 days.

Distribution and Ecology

Endemic to NEQ, restricted to the area between the Big Tableland and the Daintree River and the Butchers Creek-Boonjee area on the western side of Mt Bartle Frere. Altitudinal range from sea level to 800 m. Grows in well developed lowland and upland rain forest.

Natural History & Notes

This little known tree deserves greater recognition in horticulture. It has attractive foliage and produces outstanding displays of flowers in long racemes.

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