100 Bulletin Jard. Bot. Buitenzorq, Série IH, Vol. V. Livr. i. 



Sumatra: Palembang. (F. M. Endert, liv. pi. cuit, in Hort. Bog. 

 sub 11. 32). 



This species is at once distinguished by the very broad spur, which 

 is abruptly contracted in the lamina. 

 Description from living spécimens, 



O Microsaccus albovircscens JJ-S. n. sp. 



Caulis elongatus, dense foliatus, pars adest c. 15 cm. longa, cum foliis 

 1.4 cm. lata, internodiis c. 0.2 — 0.25 cm. longis. Folia patentia, lateraliter 

 compressa, oblique oblongo-triangula, oblique acuminata, acuta, lateralibus 

 convexa, c. 0.65-0.7 cm. longa, 0.3 — 0.325 cm. lata; vaginae internodia 

 superantes, tubulosae, lateraliter compressae, apice obliquae. Inflorescentiae 

 brevissimae, biflorae, pedunculo abbreviato, vagina incluse, nonnullis vagi- 

 nulis in bracteas vergentibus donato. Bracteae patentes, subtriangulae, 

 acuminatae, acutae, concavae, tenerae, c. 0,25 cm. longae. Flores bene 0.4 

 cm. lati, 0.55 cm. longi. Sepalum dorsale erectum, ovarium continuum, 

 auguste obovato-oblongum, obtusum, leviter concavum, dorso ad apicem 

 leviter incrassatum, Inervium, c. 0.25 cm. longum, 0.075 cm. latum. Sepala 

 lateralia patentia, divergentia, supra basin falcato-incurva, margine antico 

 supra basin in lobulum obtuse triangulum dilatata, parte antica recta, 

 lineari-oblonga. obtusa, concava, dorso valde carinato-incrassata, c. 0.23 

 cm. longa, 0.06 cm., supra basin 0.13 cm. lata. Petala parva, erecta, 

 gynostemio et labello adpressa, oblique subelliptica, obtusa, basi leviter 

 contracta, concava, Inervia, c. 0.175 cm. longa, bene 0.075 cm. lata. 

 Labellum longe calcaratum, rectum, totum c. 0.45 cm. longum, lamina 

 usque médium gynostemio adnata, gynostemium paulum superans, 

 quadrangula, apicem versus angustata, rotundato-truncata, carnosa, valde 

 concava, subtus convexa, c. 0.15 cm. longa; calcar reversum, ovario 

 parallelum, rectum, bene a dorso compressum, infra apicem leviter 

 angulato-dilatatum, apice angustatum et altius obtuse bilobulum, fere 0.3 

 cm. longum, 0.16 cm. latum. Gynostemium brève, apicem versus dilata- 

 tum et late rotundatum, dorso convexum, clinandrio excavato, margine 

 inferiore rostello arcte reflexo prominente. Anthera cucullata, peculiaris, 

 antice visa triangula basi utrinque rotundata, apice lata tenuisque, connectivo 

 antice in gibbum conspicuum porrectum obtusum subverruculosum apicem 

 antherae aequans et cum eo angulum faciens producto, c. 0.05 cm. lata. 

 Pollinia 4, suboblique obovoidea, stipite cuneato, supra basin recurvo, 

 antice convexo, apice inflexo 21obulo, glandula longa, auguste lineari, 

 paulo a latere compressa. Rostellum reflexum, medio incurvum, gynostemium 

 aequans, in lacinias subulatas bifidum. Stigma obverse triangulum. Ova- 

 rium rectum, c. 0.375 cm. longum. 



Sumatra: Craterwall of Manindjau-lake, 600—800 m. (E. JACOBSON, 

 cuit, sub n. 682). 



