Bulbophyllum phreatiopse J.J.Verm., Blumea 38 (1993) 151, fig. 6
Type: Hoogland & Craven 10899 (holo L; iso AMES, BRI, CANB, also alc., K, LAE)
Rhizome 2.5-5 mm diam., sections between pseudobulbs 4-19 cm long. Pseudobulbs widely distant, ovoid, 1.2-1.8 by 0.8-1.2 cm. Petiole 35.5 cm. Leaf blade elliptic, 10-13.5 by 2-3.3 cm, index (length/width) 4.5-5.5; obtuse. Inflorescence an elongated, dense raceme, erect to patent, 27-35 cm, 40-55-flowered. Peduncle 18-26 cm, bracts 8-11, the longest 15-25 mm long. Rachis not thickened, 7-13 cm long, glabrous. Floral bracts ovate, 2.5-5 by c. 2 mm, acute. Flowers secund, not fully opening, many simultaneously. Pedicel and ovary 1.8-3 mm long, basal node about flush with the surface of the rachis. Median sepal porrect, ovate to elliptic, c. 4.6-5.2 by 1.8-2 mm, index 2.5-3; obtuse to subacute, margins and adaxial surface finely papillose distally, base broadly attached; rather thin. Lateral sepals recurved, ovate, 5-5.5 by 2.5-3 mm, index 1.8-2, acute; otherwise as the median sepal. Petals porrect, ovate, 3-3.8 by 1.2-1.5 mm, index c. 2.5; obtuse, margins and adaxial surface papillose distally, base rather narrowly attached; rather thin. Lip recurved in the proximal half, ovate, 3-3.5 by 1-1.5 mm, index 2.3-3; rounded, thick, glabrous; adaxially concave near the base, and with a median ridge with a tooth on its crest and flanked by furrows, this median ridge proximally widening to a triangular callus forming a roof over the flanking furrows, in front of the median ridge two more ridges converging distally, adaxial surface distally convex; abaxially with a wide, retuse ridge towards the base. Column 1.51.8 mm long. Stelidia triangular, 0.6-0.9 mm long, tip acute; with or without a small, deltoid, obtuse tooth along the upper margin. Anther: front margin and abaxial ridge papillose. (After Vermeulen, 2002)
Colours: Sepals and petals white. Lip white, or orange-yellow.
Habitat: Epiphyte in lower montane forest.
Distribution: Malesia (New Guinea).
Distribution in New Guinea: Papua New Guinea; see map 96-1421M.jpg.
Cultivation: Intermediate growing epiphyte.