Plocoglottis sororia J.J.Sm., Nova Guinea 14 (1929) 352, pl. 46, fig. 13
Type: Versteeg 1599 (holo L)
Roots 0.13 cm wide. Rhizome creeping, 0.4 cm diameter. Stems 1.8 cm apart, 43.4-65 by 0.3 cm, erect, terete, leafless internodes 2.5-6 cm long; 8-11-leaved. Cataphylls 7. Leaves petiolate; sheath 5.5 cm long, petiole 1 cm long; blade 19-26 by 1.6-2.9, index 9-12, linear, base cuneate, apex acuminate, glabrous, with 3 prominent, 2 lateral subprominent veins. Inflorescence 57-58.8 cm long, 20-flowered. Peduncle 26.7-40 by 0.2-0.23 cm, sparsely pubescent, internodes 5, 0.4-12.2 cm long; peduncle scales 2.3 cm long, tubular, apex subacute to acuminate, sparsely pubescent; rachis 17-31.5 by 0.2 cm, densely pubescent, internodes 20, 0.6-7.9 cm long. Bracts; sterile bracts 4; floral bracts 0.5-0.6 cm long, triangular, apex subulate-acuminate, densely pubescent on both sides. Flowers medium size. Median sepal 1.45 by 0.45 cm, lanceolate, straight, apex subobtuse, concave, abaxially pubescent, 5 veins. Lateral sepals ca. 1.65 by 0.46 cm, reflexed, obliquely lanceolate, apex incurved, long acuminate, subulate-apiculate, abaxially pubescent, 5 distinct veins. Petals ca. 1.4 by 0.3 cm, obliquely linear-lanceolate, base inconspicuous dilate, straight to apex, near apex incurved, apex recurved, channelled-acuminate, sparsely abaxially pubescent, 3 distinct veins. Lip in total 1.2 by 0.78 cm, short saccate, adnate to column-foot at basal lamellae, with two triangular basal lamellae, strongly convex, in the middle with two long thickenings, convex; when flattened quadrangular, lateral margins patent, apex abruptly truncate, obtusely angular, in the middle with a 0.23 cm long, recurved, triangular, acute acumen. Column 0.6 cm long, thick, margin below angular, obtuse, dilated, sparsely pubescent, basal part adnate to lip, tubular, densely pubescent. Pedicel with ovary 1.75 cm long. (After Eang Hourt, unpublished manuscript 2004)
Colours: Sepals and petals yellow with red points and dots, lip and inferior part of column white, apical part of column yellow separated from the white part by a red streak.
Habitat: Terrestrial in lowland forest; 150 m.
Flowering time in the wild: August.
Distribution: Malesia (New Guinea).
Distribution in New Guinea: Papua (Indonesia). See map: 564-49M.JPG.
Cultivation: Warm growing terrestrial, requires shaded position.