Australian Tropical Rainforest Plants - Online edition

Sicyos undara I.Telford & P.Sebastian

Slender Vine
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Leaves and habit. © Australian Tropical Herbarium
Leaf and fruit. © Australian Tropical Herbarium
Leaf. © Australian Tropical Herbarium

Telford, I.R.H., Sebastian, P., de Lange, P.J., Bruhl, J.J. & Renner, S.S. (2012) Australian Systematic Botany 25: 194-196. Type: AUSTRALIA: Queensland: Cook District: Undara Volcanic National Park, 50m W of Pinwill Cave entrance, 27 March 2009, I.R. Telford 13317 & P. Sebastian; holo: BRI; iso: BISH, CANB, CHR, CNS, K, M, MO, NE, US.


Stems annual, up to 5 m long, up to 2.5 mm diam., sparsely hairy; tendrils 3- or 4-branched.


Leaves simple, lamina 2-11.7 cm long, 2-9.4 cm wide; cordate with broad basal sinus; 3- or 5-lobed; margins dentate; hairy on both surfaces; petiole 10-35 mm long.


Male and female flowers on same plant. Male flowers: in racemes of 7-25 flowers; peduncle 2.4-10.8 cm long; flowers pedicel 5-21 mm long; cayx tube (hypanthium) broadly campanulate, ca. 1.8 mm diameter; calyx lobes linear ca. 0.7 mm long; corolla 3-5.7 mm diameter, glabrous inside and out, margins glandular hairy, greenish-white, 5-lobed, lobes triangular and 1-1.8 mm long; staminal column 0.9-1.1 mm long. Female flowers: in a 4-8-flowered head; peduncle (20-)32-74 mm long; flowers subsessile; ovary ovate, 1.2 mm long, spiny; calyx tube (hypanthium) broadly campanulate above constriction; calyx lobes linear, 0.7 mm long; corolla 2.6-3 mm diameter, glabrous inside and out, margins minutely glandular hairy, greenish-white, 5-lobed, lobes triangular ca. 1 mm long; style 1.5 mm long; stigma 2-lobed, lobes recurved.


Fruit ovate or subglobose, 4-5.8 mm long x 2.2-2.6 mm diameter, surface smooth, with prickles; prickles ca. 1.4-2.8 mm long, tips recurved. Seeds ovate ca. 3.5 x 2 mm, cream.


Fetures not available.

Distribution and Ecology

Endemic to NEQ, known only from the Undara Lava Tubes east of Mt Surprise. Altitudinal range ca. 840 m. Grows in deciduous vine thicket.

RFK Code


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