ORCHIDACEiE 



atuvi Ames, from which it differs in the outhne of the labellum. 

 Referable to Pfitzer's series Edentula. (Plate 82.) 

 Marei Parei Spur, Clemens 38S, December 1915. 



2. Dendrochilum angustipetalum Ames sp. nov. Pseudo- 

 bulbi approximati, fusiformes, adscendentes, monophyUi. FoHum 

 elongatum, ligulatum, in sicco chartaceum, utrinque attenu- 

 atum, ad apicem acutum. Pedunculus graciHs. Racemus multi- 

 florus. Bracteae inflorescentiae acutae. Sepala lateraha oblongo- 

 laneeolata, acuta. Sepalum dorsale simile. Petala valde angus- 

 tata, acuta. Labellum trilobatum, tricarinatum ; lobi laterales 

 minuti, denticulati; lobus medius integer, acutus, triangulari- 

 ovatus. Gynostemium gracile. Stelidia super basim inserta, ala 

 apicalis rotundata, obscure denticulata. 



From base of pseudobulb to tip of leaf up to 25 cm. long. 

 Roots whitish, smooth. Pseudobulbs 2.5-4 cm. long, aggregated, 

 elongated, fusiform, longitudinally rugose when dry, very slen- 

 der at the tip, being gradually attenuated, ascending, monophyl- 

 lous. Leaf up to 22 cm. long, up to 12 mm. wide, nervose when 

 dry, prominently five-nerved, subchartaceous, narrowly oblong, 

 acute, attenuated at both ends, at the base passing gradually into 

 the slender petiole. Peduncle, with the raceme, ±20 cm. long, 

 slender, shorter than or equaling the leaves, naked below the 

 raceme, but closely sheathed at base by the elongated, charta- 

 ceous bracts that clothe the pseudobulbs in their immaturity. 

 Raceme about equaling the leaves, ±8 cm. long, slender, about 

 5 mm. in diameter. Bracts subtending the flowers 3 mm. long, 

 glumaceous, acute, slightly exceeding the pedicellate ovary. 

 Flowers small, cream color and brown, about twenty-five, 2 mm. 

 apart, distichous. Lateral sepals 3.5-4.5 mm. long, about 1 mm. 

 wide, faintly three-nerved, slightly falcate, oblong-lanceolate, 



acute, concave at base, lightly carinate. Dorsal sepal oblong, 



[ 47 ] 



