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acuta, intus in utraque parte canaliculae longitudinalis conve.xa, 

 dorso obtuse et crassius carinata, c. 1.1 cra. longa, bene 0.3 cm. 

 lata. Petala incurva, oblique lanceolata, acuta, basi cuneata, 

 concavula, marginibus convexa, bene 1 cm. longa, 0.24 cm. lata. 

 Labellum supra basin et apice recurvum, 31obum, basi pallide 

 viride, ceterum fuscescens, medio striis 2 longitudinalibus latis 

 parallelis atrofuscis ornatum, intus Scostatum, costa média e basi 

 usque ad apicem producta humili pallide viridi, costis lateralibus 

 basi altis aliformibus antice sensim attenuatis evanescentibusque, 

 subtus longitudinaliter sulcatum, explanatum ambitu oblongum, 

 c. 0.93 cm., usque ad apicem loborum lateralium c. 0.35 cm. 

 longum, hypochylio transverse subovali, erosulo, c. 0.85 cm. lato; 

 lobi latérales (pars libéra) parvi, recurvuli, subulati, subintegerri- 

 mi: lobus intermedius subspathulato-obovatus, rotundatus, apiculo 

 parvo triangulo recurvo, c. 0.625 cm. longus, basi 0.24 cm., 

 superne 0.43 cm. latus. Gj-nostemium curvatum, pallide virescens, 

 apice pallide fuscescens, subtus ad basin fulvum, c. 0.575 

 cm. longum, alis lateralibus supra médium gynostemii insertis, 

 patentibus, oblique lanceolatis, acuminatis, vix sigmoideis, albidis, 

 ala terminali brevioribus, ala terminali irregulariter dentata, 

 lobulata, clinandrio concavo, pede brevissimo. Anthera cucullata, 

 breviter acute acuminata, basi biloba, alba, connectivo gibboso, 

 fere 0.1 cm. lata. PoUinia 4, globoso-pyriformia, flava. Rostellum 

 patentissimum, triangulum, convexum. Stigma longitudinale, 

 oblongum. basi rotundatum, apice truncatum, margine elevatum. 

 Ovarium brève, obconicum, 6sulcatum, fuscum, c. 0.1 cm. longum; 

 pedicelïus tenuior, viridis, c. 0.225 cm. longus. 



Sumatra: Palembang, Goenoeng Dempoe. (Exp. E. Jacobson, 

 1916, Ajoeb, liv. pi. cuit, in Hort Bog.). 



One of the laigest flowered species of the genus. It lias 

 an obovate very blunt midlobe, the two latéral keels of the lip 

 very conspicuous and the side wings from the upper part of 

 the column. The whole plant at Buitenzorg is strongly tinged 

 with brown. 



Description from a single spécimen without well developed 

 leaves, to which the climate of Buitenzorg was apparently inap- 

 propriate. 



