Citation: Nicholls, Victorian Nat. 67:46 (1950).

Synonymy: Diplodium tenuissimum

Common name: Swamp green-hood.

Description:
Slender glabrous plant, 5-28 cm high; no rosulate leaves at the time of flowering; stem bracts 5-7, alternate and widely spaced; the upper ones leaf-like and broadly lanceolate, stem-clasping at the base, 1-3 cm long; the lower ones small and sheathing.

Flower solitary, greenish-white with green and some darker longitudinal striae; galea 13-25 mm long, erect, then gradually curved forward in a semicircle; the dorsal sepal produced into a long filiform point 8-10 mm long; lateral sepals (lower lip) erect; the lobes separated by a V-shaped sinus, produced into filiform c. 20 mm long erect points, embracing the galea and exceeding it by c. 15 mm; labellum on a broad mobile claw, lamina lanceolate, c. 8 mm long, curved apex not very acute, with a raised longitudinal ridge throughout; basal appendage curved, densely penicillate at the apex; column erect, incurved, c. 10 mm long, only slightly longer than the labellum; upper angle of the wings with a short point, acute, lower lobes rounded, with ciliate margins; anther shortly pointed; stigma lanceolate.

Published illustration: Gray (1971) Victorian native orchids, 2:66; Woolcock (1984) Australian terrestrial orchids, pl. 58A.

Distribution:  Forms large colonies under dense Leptospermum and Melaleuca thickets in coastal or near coastal swamps in alkaline soils but very restricted. S.Aust.: SE.   Vic. Conservation status: native Flowering time: Oct. — March.

SA Distribution Map based on current data relating to specimens held in the State Herbarium of South Australia

Biology: No text

Author: Not yet available