42 Bulletin Jard. Bot. Buitenzqrg, Série 111, Vol. V. Livr. l. 



recurva, costa média dorso promiiiente, c. 0.63 cm. longa, 0.16 cm.Iata. 

 Petala oblique lanceolata, acute acuminata, in utraque parte canaliculae 

 longitudiiiaiis coiivexa, obsolète erosula, albido-marginata, c 0.53 cm. longa, 

 0.15 cm. lata. Labellum curvulum, 2/5 partibus superioribus revolutum, 

 subsimplex, minutissime papillosum, inferne marginibus erectis concavum, 

 cinnamomeum, margine pallidius, basi dilute viride, explanatum oblon- 

 gum, in c. ^/^ partibus supra basin leviter constrictum, c. 0.36 cm. loiigum, 

 hypochylio subquadrato, margine erosulo-denticulato, costulis 3 parallelis 

 intermedia minus conspicua instructo, c. 0.12 cm. longo, 0.13 cm. lato, epi- 

 chylio (lobo intermedio) ovato, obtuso, convexo, minutissime erosulo, c. 

 0.22 cm. longo, 0.15 cm. lato. Gynostemium subundatum, dorso convexum, 

 pallide viride, c. 0.25 cm. longum, alis lateralibus magnis, basi lata basin 

 gynostemii fere et clinandrium attingentibus, oblique lanceolato-triangulis, 

 sensim angustatis, acutis, falcatis, albis,, alam terminalem cum gynostemio 

 angulum obtusum facientem oblongam irregulariter erosulo-crenulatam viridi- 

 albam aequantibus, dente brevi triangulo albo utrinque in sinu inter alam 

 apicalem et alas latérales, pede abbreviato. Anthera cucullata, cordata, sub- 

 acuminata, acuta, carneo-alba, c. 0.08 cm. longa, connectivo incrassato, 

 pallide viridi, Pollinia 4, inaequalia, oblique compresso-clavata, basi acuta, 

 dilute flava, ad 0.075 cm. longa. Rostellum majusculum, 5angulare, leviter 

 convexum, fuscescens. Stigma magnum, longitudinale, oblongo-quadran- 

 gulum, prominens, concavum, margine inferiore elevatum truncatum et 

 pallide fuscum, ceterum olivaceum. Ovarium pedicellatum brève, obtuse 

 trigonum, 6sulcatum, viride, c. 0.16 cm. longum. 



Sumatra: Benkoelen, Boekit Barisan, Rimbo Pengadang 1000 m. 

 (Exp. E. JACOBSON 1916, AjOEB, liv. pi. cuit, in Hort, Bog. sub nrs. 803 

 and 878). 



Allied to D. siinilc Bl. and perhaps nearest to D. odoratiim (RlDL.) 

 J. J. S., from which it may be distinguished by the colour of the flowers, 

 the denticulate lip with three longitudinal keels on the lower half and the 

 form of the column. 



Description from a living spécimen. 



Dcndrochilum (sect. Platyclinis) ventricosum J.J.S. n. sp. 



Rhizoma valde ramosum, vaginis brevibus infra pseudobulbos accre- 

 scentibus tubulosis imbricantibus breviter acutis sicco dense prominenter 

 nervosis glabris opacis ad c. 4.5 cm. longis tectum. Pseudobulbi approxi- 

 mati, sicco teretes, c. 1.5 — 3.4 cm. longi. Folium lanceolatum, basi acuta 

 breviter petiolato-contractum, c. 0.3—0.65 cm. infra apicem contractum, 

 obtusum vel acutum et brevissime conduplicatum, saepe plus minusve api- 

 culatum, nervis c. 7 majoribus subtus prominentibus, papyraceum, c. 5.25 — 

 18 cm. longum, 0.675—1.9 cm. latum ; petiolus canaliculatus, c. 0.25—1.8 

 cm. longus. Inflorescentia synantha in pseudobulbis subevolutis, erecta, 



