146 Materials for a Flora of the Malayan Peninsula. 



Pahang: Tahan River (Ridley); Jolior: Tebing Tinggi (Rid- 

 ley); Perak: Ipoh (Ridley 10139). Distrib. Borneo. 



35. POLYSTACIIYA. 



Epiphytes with short steins oblong lanceolate leaves thinly cori- 

 aceous. Inflorescence racemose or paniclcd terminal erect, base cover- 

 ed with sheaths. Flowers small green yellow or pink subsessile. 

 Upper sepals lanceolate, laterals triangular, adnate to the foot of 

 column. Petals very narrow. Lip jointed on the column foot 3 

 lobed, clawed, side lobes small. Column short broad foot long. 

 Anther 1 or 2 celled. Pollinia 4 ovoid usually with a broad disc. 

 Capsules elliptic. 



Species 100. S. America, Africa, India, Malaya. 



Lip narrow side lobes long, midlobe ovate . . 1. P. singapurcnsis. 

 Lip broad three lobed at the apex . . . . 2. P. penangensis. 



Lip broad side lobes short, midlobe oblong . . 3. P. siamensis. 



1. P. siNGAPURENSTS, Ridl. Joum. Linn. Soc. XXXII. 343. 

 Pseudobulbs globose •] inch long. Leaves 2-4 inches long, one inch 

 wide, oblong lorate. Scape 2-6 inches long rachis of racemes pubes- 

 cent, sheathed up to the flowers, raceme solitary or several. Flowers 

 very small yellowish green. Bracts ovate acuminate half as long as 

 the pedicel. Sepals bullate, upper one lanceolate laterals triangular. 

 Petals narrow linear spathulatc. Lip narrow thin side lobes falcate 

 linear acute, midlobe longer ovate pulverulent, spotted pink inside. 

 Column short foot long, rostellum absent. 



Singapore: Sungei Moral on trees (Ridley). 



2. P. PENANGENSIS, Ridl. l.c. 344. Pseudobulbs conic one inch 

 long, slender, branches an inch long. Bracts linear setaceous. Flow- 

 ers thin yellow, bullate. LTpper sepal lanceolate acute laterals tri- 

 angular acute. Petals narrower spathulate. Lip broad side lobes 

 short ovate midlol)e ovate obtuse hardly longer, pubescent yellow 

 with a brown median line. Column thick and short. Anther broad. 

 Capsule ^ inch long, reticulated between the ribs. 



Penang: Government Hill (Curtis 1006). 



3. P. SIAMENSIS, Ridl. l.c. 343. Pseudobulbs ^-1 inch long 

 conic. Leaves 5 inches long by ^-1 inch wide, lorate or oblong obtuse 

 or subacute. Inflorescence, racemose or paniclcd, 4-12 inches long. 

 Flowers large and more fleshy than the two preceding species, rachis 

 pubescent. Bracts ovate subulate. Sepals ovate lanceohite, laterals 

 triangular green. Petals much narrow falcate acute white. Lip 

 t)l)ovate mealy yellow broad, side lobes small narrower falcate obtuse, 

 midlobe much longer broad rounded apex retuse. Column short. 



