Australian Tropical Rainforest Plants - Online edition

Alectryon semicinereus (F.Muell.) Radlk.

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Leaves and Flowers. © CSIRO
Fruit and leaves. CC-BY: B. Gray
Leaves and fruit. © CSIRO
Scale bar 10mm. © CSIRO
10th leaf stage. © CSIRO
Cotyledon stage, epigeal germination. © CSIRO

Radlkofer, L.A.T. (1879) Actes du Congres Internationale de Botanistes .. Amsterdam for 1877 : 118.


A small tree seldom exceeding 30 cm dbh. Sapwood surface slightly corrugated.


Leaflet blades about 5.5-18.5 x 2.5-8.5 cm, whitish on the underside and sparsely clothed in short, prostrate, white hairs. Midrib +/- flush with the upper surface. Young twigs longitudinally grooved and clothed in short, brown, tortuous hairs.


Calyx about 2.5-3.5 mm, pubescent on the outer surface. Petals present, minute, shorter than the calyx. Disk yellow.


Fruits 1-3-locular, about 6-12 mm wide. Seeds black, about 4-5 mm diam. Aril cupular or almost enveloping the seed, fleshy and red.


Cotyledons about 8-10 mm long. First pair of leaves trifoliolate, toothed or lobed, subsequent leaves simple and lobed becoming pinnate or trifoliolate by the tenth leaf. At the tenth leaf stage: leaflet blades glabrous throughout and glaucous on the underside. Seed germination time 23 to 61 days.

Distribution and Ecology

Endemic to Queensland, occurs in NEQ and in south-eastern Queensland but not in coastal central Queensland. Altitudinal range from 450-850 m. Grows as an understory tree in drier, more seasonal rain forest often associated with Kauri Pine (Agathis robusta).

Nephelium semicinereum F.Muell., Fragm. 4: 158(1864), Type: Queensland, Rockingham Bay, J. Dallachy; iso: BRI, NSW.
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