Australian Tropical Rainforest Plants - Online edition

Sarcotoechia protracta Radlk.

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Flower and buds. © Barry Jago
Scale bar 10mm. © CSIRO
Cotyledon stage, hypogeal germination. © CSIRO
10th leaf stage. © CSIRO

Radlkofer, L.A.T. (1879) Sitzungsberichte der Mathematisch-Physikalischen Classe der k. b. Akademie der Wissenschaften zu Munchen 9 : 525. Type: Queensland, Rockingham Bay, Oct. 1870, J. Dallachy; lecto: MEL. Fide S. T. Reynolds, Fl. Australia 25: 201 (1985).


Sapwood surface slightly corrugated. Blaze odour faint but resembling green beans (Phaseolus vulgaris).


Leaflets about 4-6 in the compound leaf, each leaflet blade about 7-16 x 2.5-6 cm. Leaflet stalk often purplish and swollen at its junction with the compound leaf rhachis. Midrib raised on the upper surface. Leaflet blade slightly arched between the major lateral veins. Terminal buds clothed in shiny brown, prostrate hairs.


Inflorescence about 5-7 cm long, pedicels about 1-2 mm long. Calyx about 1 mm long, lobes rounded, ciliate. Petals +/- obtriangular, about 1 mm long. Each petal with two hairy scales or appendages on the inner surface. Stamens eight, filaments hairy at least in the lower half, about 3 mm long, inserted inside the yellow-orange disk.


Fruits +/- globular, about 18 x 20 mm, valves thick and fleshy, silky on the inner surface. Aril somewhat lateral and only covering the base of the seed. Seeds flattened, ovoid-ellipsoid, about 9-16 x 7-10 mm, cotyledons green.


First pair of leaves simple, elliptic or ovate, apex acuminate, base attenuate. Midrib raised on the upper surface. Petiole swollen at the base near its junction with the stem. At the tenth leaf stage: midrib and the main lateral veins raised on the upper surface; lateral veins curving and forming loops inside the blade margin; terminal bud clothed in +/- prostrate, chestnut brown hairs. Seed germination time 17 to 19 days.

Distribution and Ecology

Endemic to NEQ. Altitudinal range from near sea level to 750 m. Grows in well developed rain forest on a variety of sites.

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