49,4 Ames and Quisumbing: Philippine Orchids, III 499 
nila. Rachis of the inflorescence greenish; pedicellate ovary 
white; sepals and petals white on back and front washed with 
lumiere green or light lumiere green, and spotted and barred 
with claret brown on the petals and raw umber on the sepals; 
lateral lobes of the labellum pale viridine yellow; middle lobe of 
the labellum white; spotted with ox-blood red above, on both 
sides of the keel above and empire yellow at the very tip of the 
tongue; callus at the base of the labellum between the lateral 
lobes cuplike, white, light orange yellow within. 
In habit this unique species suggests Sarcanthus pachyphyllus, 
especially in the very rigid, thick, keeled, falcate leaves, but it 
differs radically in floral characters. In floral structure it is 
very much like Vandopsis lissochiloides (Gaudich.) Pfitz., but 
its flowers are much smaller and of different color. 
This very interesting species is dedicated to Hon. Dwight F. 
Davis, for his interest in orchids and particularly for his un¬ 
selfish devotion and interest in his work when Governor-General 
of the Philippines. 
Genus MICROSACCUS Blume 
MICROSACCUS WENZELII Ames. Plates X, 13, and 28. 
Microsaccus Wenzelii Ames Orch. 5 (1915) 257, in Merr. Enum. 
Philip. FI. PI. 1 (1925) 442. 
Planta pusilla, epiphytica. Radices in basi caulium. Caules depen- 
dentes (?) usque ad 1 dm. alti, circiter 3 mm. in crassitudine, cum foliis 
usque ad 4 cm. lati, vaginis foliorum persistentibus obtegentibus: inter- 
nodia brevia vaginis omnino tecta, 3 mm. longa. Folia biseriata, paten- 
tissima, equitantia, crasse carnosa, lateraliter compressa, oblonga a latere 
visa, dorso et apice acutangula, obtusa sed a basi sensim angustata, in 
sicco valde rugosa, usque ad 2 cm. longa, circiter 5 mm. alta, supra cana- 
liculata. Inflorescentiae axillares, brevissimae, 1 (-2) florae. Pedunculus 
folii vaginis aequilongus. Bracteae ovatae vel orbiculares, valde concavae, 
extus leviter carinatae, membranaceae, usque ad 5 mm. longae. Flores 
parvi, albi. Sepala lateralia leviter falcata, obtusa, extus, prope apicem, 
carinata, trinervia, vix 5 mm. longa, 2 mm. lata. Sepalum dorsale sepalis 
lateralibus minus, ad apicem cucullatum et incrassatum vel carinatum, 4 
uim. longum, 1.5 mm. latum, trinervium. Petala oblongi-lanceolata, uni- 
nervia, obtusa, 3 mm. longa, 1 mm. lata. Labellum calcaratum, spathu- 
latum vel cuneato-obovatum, ad apicem obscure trilobatum, in disco bica¬ 
llosum. Lamina incrassata cum calcari 7 mm. longa, ad apicem 3 mm. 
lata. Calcar circiter 2 mm. longum, scrotiforme, emarginatum. Gynoste- 
nuum brevissimum. Fructus 7 mm. longus. 
Epiphyte. Stems curved in maturity, the base terete, leafless, 
but covered with remnants of sheaths, the apical portion foliose, 
U P to 11.5 cm long. Roots fibrous, numerous. Leaves con- 
272089—2 
