ORCHIDACE^ 



the pedicellate ovary. Flowers very small, pellucid in the dried 

 specimen. Lateral sepals about 6-7 mm. long, 2.3 mm. wide, 

 lance-attenuate with long caudate apices resulting from the in- 

 volute margins, forming a saccate mentum, three-nerved. Dor- 

 sal sepal about 5 mm. long, 1.3 mm. wide, linear-lanceolate, with 

 a similar but shorter attenuate tip, concave below, one- or three- 

 nerved at the base. Petals much smaller, about 2 mm. long, 

 .33 mm. wide, linear, acute or subacute, one-nerved, cellular on 

 the upper margins. Lip in natural position strongly decurved 

 below the middle, the lower portion membranaceous with the 

 sides erect and conduplicate, the anterior portion ovate-elliptic 

 and acute or subobtuse at the apex; lamina when expanded nar- 

 rowly deltoid in outline, appearing trilobed, about 2.8 mm. long, 

 1.4 mm. broad across the suborbicular hypochil, bicallose at the 

 base, three-nerved. Column very minute, provided with a pair of 

 parallel narrowly triangular acuminate arms. Column foot thick- 

 ened in the lower portion, unciform above. 



This little plant is very near to Bulbophyllum polypodioides 

 Schltr., being almost identical vegetatively, but it is clearly dif- 

 ferentiated by its thinner perianth, longer more caudate sepals, 

 narrower petals and smaller lip. This species is distinguished from 

 B. adenopetalum Lindl. by its more robust habit, prominent caul- 

 ine sheaths and apparently efimbriate Up. It differs from B. pu- 

 berulum Ridl. in having a longer narrower leaf and simple col- 

 umn arms. It is distinct from B. apodum Hook. f. in lacking a 

 strict scape which is floriferous almost to the base. 



LoBON'G Cave, Clemens 113 A, November 1915. 5000 feet altitude. 



6. Bulbophyllum (§ Sestochilus) concavum A.&^S. sp. nov. 



Herba pro sectione gracilis. Rhizoma repens. Pseudobulbi re- 



moti, cylindracei, monophylli. Folium lineari-oblongum, falca- 



tum, apice in visu acutum, basi cuneatum, breviter petiolatum, 



[168 ] 



