Gouania exilis K.R.Thiele
Thiele, K.E. & West, J.G. (1995) Austrobaileya 4: 414. Type: Australia. Queensland. Cook District: Iron Range, 15 June 1948, L. J. Brass 19192 (holo: CANB; iso: BRI).
A slender vine not exceeding a stem diameter of 2 cm. This species appears to grow during the wet season and die back in the dry.
Inflorescence a raceme or a raceme of fascicles. Male flower borne mainly towards the ends of the racemes while the hermaphrodite flowers are borne mainly towards the base. Flowers about 2 mm diam. Calyx tube (hypanthium) hairy, about 1.2 mm long. Sepals about 1 mm long, outer surface clothed in hairs, inner surface keeled. Petals about 0.9-1 mm long, hooded at the apex, each encompassing a stamen. Staminal filaments about 0.4 mm long. Pollen +/- translucent. Style shorter than the hypanthium. Style three-branched. Ovules one per locule.
Fruits 3-4-lobed, dehiscent, each fruit about 5-9 x 8 mm. Calyx lobes (5) persistent at the apex. Fruits split into 3, 2-winged segments about 7-9 x 8-10 mm, with a single seed in each segment. Seeds brown, about 2.5-4 x 1.5-2.5 mm. Testa covered in a clear or translucent waxy layer. Cotyledons green, about 1.5-2 x 1.2 mm. Radicle straight, about 0.4 x 0.3 mm.
Cotyledons orbicular to obovate, about 5-5.5 x 4-5-5 mm. Stipules of the first pair of leaves triangular, about 0.7 x 0.7 mm. Stems 4-angled with hairs on each rib. At the tenth leaf stage, leaf blade glabrous, narrowly cordate to lanceolate, apex acute, base cordate. Petiole hairy, about 5-7 mm long. Stipules narrowly triangular, about 2 x 1 mm. Stem longitudinally ribbed, glabrous or sparsely clothed in hairs. Seed germination time 99 days.