Citation: R. Br., Prod. Fl. Nov. Holl. 316 (1810).

Derivation: Greek orthos, straight; keras, a horn.

Synonymy: Not Applicable

Common name: None

Description:
Terrestrial glabrous herb, with more or less ovoid tubers; leaves radical or almost so, several, linear; 2 or 3 membranous scales at the base of the scape.

Flowers resupinate, on short pedicels, rather distant and racemose; dorsal sepal rather broad, incurved, contracted at the base, cucullate; lateral sepals much longer, narrow-linear, spreading laterally; petals short, erect, often oblong or cuneate; labellum recurved, 3-lobed; the middle lobe contracted at the base and much longer than the lateral ones; a large fleshy callus at the base; anther erect or incurved, tapering to 'the apex, 2-celled, on an extremely short filament arising from the posterior border of the floral receptacle, the lateral appendages or wings of the filament erect or incurred and adnate to the base (the style) of the stigmatic-plate as in some members of the genus Prasophyllum; the stigmatic-plate carrying the stigma and rostellum, erect in front of the anther; pollen-masses 2, each 2-lobed, cohering near their apices, suspended loosely from the anther-septum after dehiscence, but later dropping on to the back of the stigmatic-plate without any sort of attachment to the rostellum, mealy and friable; a viscid disk of the rostellum and caudicle absent.

Distribution:  A monotypic genus which does not occur in the tropics.

Biology: No text

Author: Not yet available