Growth form Epiphyte, 4-5 cm high. Rhizome not seen. Root filiform, flexible, glabrous. Stem long, entirely covered with leaf sheaths, proliferously leafed, internodes 0.2-0.3 cm long. Leaf small, patent, ovate to ovate-oblong, margin crenulate, concave-angular, carnose; apex unequally 2 lobe, both lobe obtuse, with short apiculum; base rounded; lamina 0.7-0.925 cm long, 0.4 cm wide; sheath tubular, with longitudinal prominent nerves, transversely warty; apex toothed or without tooth, with glabrous margin. Inflorescences terminal, 4-flowered, sessile, when young enveloped by a spathe. Spathe not seen; floral bracts orbicular-ovate, concave, apex slight contracted, obtuse-cucullate, base broad, dorsal part with keel, 3-5-nerved, 0.65-0.75 cm long, 0.57-0.9 wide. Flower upright or upside-down, glabrous. Median sepal not seen. Lateral sepal front margin deeply connate, at column foot shortly decurrent, free part oblique-ovate, obtuse, apiculate, 0.4 cm long, 0.3 cm wide; mentum saccate, subtruncate , slightly retuse, enclosed the spur, 5-nerved, 0.8 cm long. Petal oblique-oblong, obtuse, base narrowed, 3-nerved, 0.725 cm long, 0.2 cm wide. Lip lower half adnate to the column and the column foot, up to the apex of the ovary 0.28 cm long, up to apex of the spur 0.34 cm long, rounded-acute-angular recurved, concave, base obtuse-angular channeled, when not flattened sub-quinquingular, when flattened sub-orbicular, base abruptly transversely channeled, 7-nerved, 0.225 cm long, 0.2 cm wide; epichile obtuse; hypochile spurred; spur base appressed ovary, making an acute angle with the ovary, oblong-oval, apex rounded-truncate, 0.2 cm long. Column curved, dorsally convex, making obtuse angle with ovary, without anther 0.2 cm long, lower half adnate to the lip, with column foot; column foot distinct, 0.07 cm long; clinandrium reflexed, crescent-shaped, with posterior wall; stelidia triangular, acute. Anther not seen; rostellum conspicuous, slightly rounded-cutted-truncate, convex above, concave below; stigma with rostellum form dome-shaped, lower margin slightly dilated, incurved, rounded. Ovary with pedicel, 0.4 cm long. Capsule not seen.
Distribution – Indonesia, Seram.
Habitat and Ecology - Epiphyte in montane forest on limestone of Mt. Murkele. Altitude 1900-2500 m. Flowering in July in the wild.
Notes - 1. Flowers white.
3. The epithet pumilio refers to the small size of the species (pumilio means dwarf in Latin).
4. Specimen observed L. Rutten 1469.