Cirrhopetalum gracillimum Rolfe, Kew Bull. 34 (1895); Bulbophyllum gracillimum (Rolfe) Rolfe, Kew Bull. 412 (1907). Type: Burmah?, T.R. Jarvis, J. O’Brien and F. Horsman & Co s.n. (holo K).
Cirrhopetalum psittacoides Ridl., J. Proc. Linn. Soc., Bot. 32: 280 (1896); Bulbophyllum psittacoides (Ridl.) J.J.Sm., Orch. Ambon 84 (1905). Type: Freshwater Isl., Singapore, H.N. Ridley s.n. (holo BM; iso BM, SING).
Cirrhopetalum leratii Schltr., Repert. Spec. Nov. Regni Veg. Beih. 9: 216 (1911); Bulbophyllum leratii (Schltr.) J.J.Sm., Bull. Jard. Bot. Buitenzorg. 28: 25 (1912). Type: New Caledonia, Mt. Dzumac, Le Rat s.n. (holo B).
Cirrhopetalum warianum Schltr., Repert. Spec. Nov. Regni Veg. 1: 890 (1913). Type: Kaiser-Wilhelms-Land: On trees in the forests near Adolfhafen, at the mouth of the Waria River, alt. c. 10 m, Apr. 1909, R. Schlechter 19215 (holo B; iso K).
Occurs in north-eastern Queensland on Janet Range, Iron Range and Tozer Range on Cape York Peninsula.
Altitude: 300-400 m.
Also found in Indonesia, New Caledonia, New Guinea, Malaysia, Myanmar, Solomon Islands and Thailand.
Epiphytic herb forming small to medium-sized moderately dense clumps. Rhizomes creeping, appressed to host, branched, slender, 2 mm thick. Pseudobulbs widely spaced, erect, ovoid, 1-1.8 cm x 1-1.5 cm, dark olive green, with 4-5 prominent ridges. Leaf solitary on pseudobulb, erect, apical, shortly petiolate; lamina oblong to narrowly ovate, 5-8 cm x 3-3.5 cm, dark olive green, thick, leathery, apex emarginate. Inflorescence an axillary umbel, erect to arching, 150-250 mm long, wiry, from base of pseudobulb. Flowers 6-10, resupinate, porrect, in semi-circular umbel, each flower 30-50 mm x 5-8 mm, purplish red with a white or cream labellum. Dorsal sepal porrect, hooded, ovate, 3 x 2 mm, apex with erect filiform cilium 5-6 mm long, margins hairy. Lateral sepals deflexed, twisted, 'outer' margins fused near base to form a short synsepalum, 7-8 mm x 3-4 mm, bases fused to column foot; apices drawn into filiform tails 18-25 mm long. Petals drooping, triangular, 5-6 mm x 1 mm, hairy. Labellum unlobed, hinged to the apex of the column foot, porrect to decurved, 1.6-2 mm x 1 mm, fleshy, curved, grooved towards the base. Column at an angle to the ovary, 2 mm x 1 mm. Column foot at right-angles to the column, 2 mm long, apex uncinate. Capsules erect, dehiscent.
Grows on trees in stunted rainforests and in gallery forests along streams, usually in situations where there is an abundance of air movement.
Flowering period: August-March.
This species is generally rare in Australia.
Until recently known as Bulbophyllum gracillimum. It was also known for a period in Australia by its synonym Cirrhopetalum leratii (Bulbophyllum leratii.