Acianthus
Terrestrial glabrous herbs, arising from small tubers. Leaf solitary, flat, but held above the soil surface, broadly cordate to ovate, entire, lobed or rarely deeply dissected; flowering stem elongate, slender, without scales above leaf except the small bracts subtending pedicels. Flowers 1 or more, with column uppermost, greenish to purplish; dorsal sepal not very broad, erect or incurved over column, concave; lateral sepals narrow, spreading or upwardly curved; petals much shorter, reflexed or spreading. Labellum sessile, ovate, undivided, with 2 basal glands; callus covering most of lamina surface, fleshy, smooth or papillose towards apex. Column semi-terete, incurved or inflexed, very narrowly or not winged, shorter than labellum.
About 20 species distributed in the southern Pacific region; 11 species occur in Australia, 5 in Victoria.
Entwisle, T.J. (1994). Orchidaceae. In: Walsh, N.G.; Entwisle, T.J., Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons, pp. 740–901. Inkata Press, Melbourne.
Spinning
