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Scale bar 10mm. Copyright CSIRO
Leaves and fruits. Copyright CSIRO
Leaves and Flowers. Copyright CSIRO
Aristolochia chalmersii O.C.Schmidt
Schmidt, O.C. (1932) Repertorium Novarum Specierum Regni Vegetabilis 30: 73. Type: Queensland: Thursday and Jervis Isl. (Torres Strait), 1878 Rev. J. Chalmers, Syn: MEL; Lizard Is. Collector?, S?.
Aristolochia sp. (Mt White), Climbing Plants of Australia: 154(1988), Type: ?.
A slender vine, stem diameter not exceeding 3 cm.
Leaf blades about 3.5-11 x 5-15 cm, petioles about 3-8 cm long. Leaf blades very soft in texture, thin and rather flimsy. Petioles thickened and twisted near the base forming a type of tendril.
Inflorescence up to 10 cm long, each flower subtended by a cordate bract about 10-15 x 10-15 mm. Flowers pendulous. Perianth somewhat curved, +/- sinuous, tube inflated at the base but constricted just above the inflated base to form a tube about 2 mm diam. Apex of the perianth tube flared like a trumpet with a lip-like protrusion about 25 x 5 mm with recurved margins. Stamens 6, fused together to form a structure about 3 x 4 mm around the style. Anthers sessile. Stigmas 6. Ovules numerous in each locule.
Fruits before dehiscence about 15-20 x 8-16 mm on a slender stalks about 14-15 mm long. Outer surface with 12 longitudinal ribs. Fruits split from the base upwards into 5 or 6 segments and after dehiscence resemble a parachute. Seeds numerous, stacked like biscuits in cylindrical packets. Individual seeds cordate in outline, about 5 x 3-5 mm. Testa tuberculate and +/- keeled on one side. Embryo tiny, straight, about 0.5-1 mm long, located at the pointed end of the seed.
Features not available.
Distribution and Ecology
This species has been recorded as a host for the larvae of the Big Greasy (Cressida cressida cressida), and possibly also the Cairns Birdwing Butterfly (Troides euphorion). Ross & Halford (2007).