Australian Tropical Rainforest Plants - Online edition

Alchornea rugosa (Lour.) Mull.Arg.

Shrub (woody or herbaceous, 1-6 m tall)
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Male flowers [not vouchered]. © G. Sankowsky
Female flowers [not vouchered]. © G. Sankowsky
Female flowers. © CSIRO
Immature fruit [not vouchered]. © G. Sankowsky
Leaves and female flowers. © CSIRO
Habit, leaves and infloresences [not vouchered]. © G. Sankowsky
Scale bar 10mm. © CSIRO
10th leaf stage. © CSIRO

Mueller Argoviensis, J. (1865) Linnaea 34: 170.

Common name

Alchorn Tree


A small tree seldom exceeding 20 cm dbh, often flowering and fruiting as a shrub.


About 2-5 flat glands normally visible near the base on the underside of the leaf blade on each side of the midrib. Leaf blades about 6.5-14 x 3-6.5 cm. Small oil dots visible with a lens. Domatia are inconspicuous tufts of hairs. Midrib raised on the upper surface.


Male flowers: Flowers in spikes, fascicles and panicles, branches about 10-20 cm or more long. Female flowers: Flowers in spikes or racemes about 10-15 cm long. Stigmas linear-subulate, often recurved at the apex.


Capsules pubescent, +/- depressed globular, 3-lobed, about 7-8 x 9-10 mm, calyx and stigmas persistent. Seeds about 6 x 4-5 mm.


At the tenth leaf stage: margin serrate; domatia, if present, are inconspicuous tufts of hairs, visible with a lens; petiole covered with short pale hairs. Seed germination time 26 days.

Distribution and Ecology

Occurs in CYP, NEQ and CEQ. Altitudinal range from near sea level to 700 m. Grows in well developed rain forest, particularly gallery forest. Also occurs in SE Asia and Malesia.

Natural History & Notes

This species may have medicinal properties.

Cladodes rugosa Lour., Fl. Cochinch. : 574(1790), Type: Vietnam.
RFK Code
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