PHILIPPINE ORCHIDS. 
133 
Sepala lateralia, triangulari-lanceolata, 3-nervia. Sepalum su- 
perius concavum, oblongi-lanceolatum, 3-nervium. Petala spath- 
ulata, 1-nervia. Labellum ovato-lanceolatum, 3-nervium, acutum. 
Columna breviter bicuspidata. 
Plants small, copiously rooted, caespitose, leaves crowded. 
Pseudobulbs practically wanting. Leaves fleshy, coriaceous, 
rugose when dry, elliptic or oblanceolate, rounded at the retuse 
tip, 1 to 2 cm long, 6 to 8 mm wide. Petiole very short, causing 
the leaves to appear sessile. Scape shorter than the leaves or 
barely equaling them, up to 2 cm long, bearing, in the specimens 
studied, only two yellowish flowers. Bracts of the inflorescence 
about half as long as the shortly pedicellate ovary. Lateral 
sepals triangular-lanceolate, acute, 4.5 mm long. Upper sepal 
about 4 mm long, concave, oblong-lanceolate, acute. Petals much 
smaller than the sepals, about 2 mm long, spathulate, 1-nerved. 
Labellum comparatively large, ovate-lanceolate, acute, 3-nerved, 
3 mm long, 2 mm wide. Column minute, bicuspidate. 
Luzon, Bontoc Subprovince, August 17, 1911, Father M. Vanoverbergh 
1381. Epiphytic, altitude 1,650 meters above sea level. 
Bulbophyllum Vanoverberghii sp. nov. 
Pseudobulbi 0. Folia petiolata, coriacea, oblongi-elliptica. 
Scapus gracilis, erectus, folio longior, bracteis tubularibus prope 
basim. Racemus gracilis, multiflorus. Bracteae ovariis longio- 
res, anguste lanceolatae. Sepala lateralia triangulari-lanceolata, 
acuminata, acuta, subcaudata. Sepalum superius lanceolatum, 
acutum ad basim concavum. Petala lineari-oblonga, obtusa, 1- 
nervia. Labellum crassum, 3-nervium, lingulatum, obtusum, 
ad basim bituberculatum, bicarinatum prope medium. Columna 
bifurcata. 
Rhizome creeping, about 5 mm in diameter, copiously rooted. 
Pseudobulbs 0. Leaves petiolate, very thick, coriaceous, yel- 
lowish when dry, rugose. Petiole 2.5 to 5 cm long, sulcate, 
about 3 mm thick, rigid. Lamina elliptic-oblong, obtuse, bilobed 
at the tip, abruptly or gradually contracted at the base, margin 
revolute, average length about 15 cm, average width 4 cm. 
Scape erect, sheathed up to the lowermost flower by about four, 
loose, acute, vaginate bracts. Raceme slender, many-flowered, 
12 to 22 cm long. Bracts exceeding the ovaries, linear-lanceo- 
late, acuminate, acute, diaphanous in dried specimens, about 7 
mm long. Flowers yellowish or whitish, up to 8 mm long, 
segments of the perianth hardly spreading. Lateral sepals tri- 
angular-lanceolate, acuminate, subcaudate-tipped, acute, smooth. 
