^ 21 - 



I miist add that 1 hâve seen no spécimens of D. ornata and D. bor- 

 neensis. 



One of the two plants coUected on Mt. Talamau is a very strong one, 

 tlie rachis iiot yet fullgrown having reaclied a length of 11 cm. There is 

 too a young fruit with the pedicei elongated as in the speices of the sec- 

 tion Eii-Didymoplexis. 



Description from the Banka spécimen only. The flowers of the Su- 

 matra niaterial do not sliow différences 



The flowers of the Sumatra plant are described by the coliector as 

 browh green with a white centre, those from Banka as chocolaté brown. 



Va n i 1 1 a a b u n d i f 1 o r a J. J. S. n. sp. 



Caulis eloiigutus, scandens, cylindricus, carnosus, viridis, c. 1.3 — 1.6 

 cm. diam., internodiis ad c, 6.5— 9 cm. longis, radicibus 1 — 2 e nodis, tenuius- 

 culis, Folia magna, oblongo-elliptica ad elliptica, acute acuminata, basi 

 petiolato-contracta, convexa, carnoso-coriacea, nitide viridia, ad c. 25 cm. 

 longa, 8.75 cm, lata, petiolo valde canaliculato, c. 1.5 cm. longo, Inflore- 

 scentiae validissimae, eloiigatae, densissimae, valde multiflorae, diu flores 

 gignentes, rachide 30 cm. superante, 0.9 cm. diam. Bracteae Sseriales, per- 

 sistentes, patentes, ovario adpressae, semiellipticae, obtusae, concavae, c. 

 0.35 cm. longae. Flores plus quam 150, magni, carnosuli, sepalis petalisque 

 erectis, divergentibus. Sepalum intermedium oblanceolatum, apice angusta- 

 tum, auguste obtusum, concavum, supra basin c. llnervium, c. 5 cm. 

 longum, basi 0.4 cm., superne 1.5 cm. latum. Sepala lateralia oblique obo- 

 vato-oblonga, inaequilatera, apice acutata, auguste obtusa, concava, c. 5 cm. 

 longa, 1.75 cm. lata. Petala oblique cuneato-oblongo-obovata, basin versus 

 sensim angustata, obtusa, costa média intus convexo-incrassata dorso ma- 

 nifeste angulato-prominente et sulcis limitata, c. 5 cm. longa, basi 0.3 cm,, 

 superne 1.8 cm. lata, Labellum gynostemio longitudine c, 2.3 cm, in formam 

 infundibuli obliqui basi tenuis superne subtus inflati adnatum, parte antica 

 liberum, convolutum, apicem gynostemii obtegens, margine apicali valde 

 revolutum et undulatum, subtus longitudinaliter sulcatum, inexpianatum c. 

 3.9 cm. longum, 1.9 cm. latum, explanatum ambitu cuneato-obovatum, parte 

 libéra valde dilatatum, apice late rotundatum, obsolète 31obum et praesertim 

 medio dentatum, ulriiique rotuiidatum, c, 3.9 cm. longum, apice 3.5 cm. 

 latum, parte cuneata 2.2 cm. longa, 2 cm. lata, parte mediana carnosa in- 

 tus concava et verruculis irregulariter seriatis obsita, excavatione alte ovali 

 ad basin partis liberae, coUaribus 3 brevibus n^omiibus antice affixis 

 reversis adpressis angustis denticulatis posterioribus majoribus fasciculum 

 squamarum excavationis margini antico insertarum reversarum semiovalium 

 apice dilatato truncatarum et minute denticulatarum valde longitudinaliter 

 plicatarum c. 0.35 cm. longarum circumdantibus omnibus c. ^/a partes ex- 

 cavationis occupantibus, parte mediana ante excavationem leviter convexo- 

 incrassata basin versus angustata utrinque acute marginata basi ad marginem 

 excavationis in regulam transversam acutam postice rotundato-excavatam 



