ORCHIDACE^ 



vanced and the terminal part of the raceme bears only whorls 



of bracts. 



This species is very close to the Philippine Oberonia hispidula 



Ames, but it shows several distinct differences. In O. hispidula 



the leaves are gently but distinctly falcate-incurved, the bracts 



are aristate, the flowers smaller and greenish. O. mindorensis 



Ames has blunt leaves and greenish flowers which are different 



in detail. O. padangensis Schltr. is a similar plant with fewer 



leaves and broader racemes of larger flowers. O. pleistophylla 



Schltr. possesses denser incurved leaves, erect racemes, and green 



flowers with a different lip. (Plate 90.) 



LoBONG Cave, Clemens 10 If, (Type), November 1915. 5000 feet altitude. 

 Flowers brown. Kiau, Clemens '27, November 1915. Flowers tan brown. 



4. Oberonia triangularis A. S^ S. sp. nov. Radices fibrosae, 

 flexuosae, longitudinaliter sulcatae. Herba caulescens. Caulis flex- 

 uosus, in visu erectus, foliis omnino obtectus. Folia disticha, equi- 

 tantia, valde imbricantia, a latere visa triangularia apparentia, 

 marginibus superioribus anguste scariosis. Pedunculus infra ra- 

 cemumperbrevis,striatus,verticillisbractearum fimbriatarum ob- 

 tectus. Racemus arcuato-flexuosus. Rachis densissime pubescens. 

 Bracteae inflorescentiae lanceolatae, concavae, fimbriatae. Flores 

 subverticillati, in medio racemi densissimi, parte apicali rachidis 

 omnino deficientes. Sepala lateralia ovata, acuta. Sepalum dor- 

 sale rotundato-ovatum, obtusum. Petala anguste ovata. Label- 

 lum sepalis majus, in circuitu triangulari-subquadratum vel sub- 

 quadratum, basi truncatum, apice bilobatum. Ovarium densis- 

 sime tomentosum. 



Roots fibrous, flexuous, furrowed, up to 1 mm. thick. Plant 

 caulescent. Stem about 9.7 cm. tall from the base of the plant to 

 the base of the raceme, regularly flexuous or sinuous, entirely 

 concealed by the leaves. Leaves distichous, equitant, closely im- 



[85] 



