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Gouania australiana

Family

Rhamnaceae

Botanical Name

Gouania australiana F.Muell.

Mueller, F.J.H. von (1864) Fragmenta Phytographiae Australiae 4: 144. Type: Queensland, Rockingham Bay, J. Dallachy; holo: MEL.

Synonyms

Gouania hillii F.Muell., Fragmenta Phytographiae Australiae 8: 163(1874), Type: Queensland, Daintree-River, W. Hill; holo: MEL..

Stem

Vine stem diameters to 6 cm recorded.

Leaves

Stipules caducous, triangular, about 2-4 mm long. Leafy twigs and petioles densely clothed in pale brown hairs. Leaf blades about 5-12 x 3-10 cm, petioles about 1-2 cm long, narrowly channelled on the upper surface. Both the upper and lower surfaces of the leaf blades densely clothed in prostrate hairs. Lateral veins depressed on the upper surface of the leaf blade. Reticulate veins run like ladder rungs from one lateral vein to the next. A few inconspicuous teeth may be visible on the margin of the leaf blade near the apex or close to the base. Tendrils simple (unbranched) arising in the leaf axils or terminating lateral branches, sometimes part of an inflorescence.

Flowers

Flowers pleasantly perfumed, borne in elongated panicles of spikes where the flowers are aggregated in discrete fascicles. Flowers about 2-3 mm diam., hypanthium hairy, about 1 mm long. Calyx lobes broadly triangular, about 1 mm long, hairy on the outer surface. Petals +/- spathulate, about 1 mm long, enveloping the stamens. Stamens about 1 mm long, attached outside the disk. Style and stigma about 1 mm long, protruding through the broad crenately edged disk. Ovules one per locule.

Fruit

Fruits 3-lobed, dehiscent, resembling a capsule. each fruit about 5 mm long. Fruits split into three segments with a seed remaining enclosed in each winged segment. Seeds about 1.2-1.5 mm long. Embryo about 1.2-1.5 mm long.

Seedlings

Cotyledons orbicular, about 3.5-4 x 3-3.5 mm, apex truncately obtuse, midrib not extending to the apex. First leaf blades ovate, margins with 1-3 teeth on each side. Leaf blades 3-veined, both the upper and lower surfaces clothed in hairs. At the tenth leaf stage: leaf blade lanceolate, apex acute with a short mucro, base truncate or cordate. Both the upper and lower surfaces of the leaf blade clothed in hairs, margin with 1-3 teeth on each side. Stipules narrowly triangular, about 2-3 x 1 mm.

Distribution and Ecology

Endemic to NEQ. Altitudinal range from near sea level to 300 m. Grows in well developed lowland rain forest.

NEQ

X

Vine

X

RFK Code

2030