o 



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Sumatra: Benkoelen, Boekit Baiisan, Rimbo Pengadang, 

 1000 m. (Exp. E. Jacobson 1916, Ajoeb, liv. pi. cuit, in 

 Hort. Bog. sub. n. 757). 



An ally of D. connafum Lndl.. but with very sraall white 

 flowers. The teeth on both sides of tlie column are remarkable. 

 Description froni a living plant. 



ileie$irol>iiiiii (sect. Distichophyllum) iKiri^aiiiiiii 



J. J. S. n. sp. 



Gaules approximati, siraplices, leviter serpentin!, basin et 

 apicem versus sensim attenuati, sectione transversa rhombei, 

 4sulcati, dilute tlavo-virides, ad c. 18 — 20 cm. longi, medio ad 

 0.43 cm. et 0.5-0.55 cm. diam. Folia parva, patentia vel 

 patentissima, basi semitorta sessilia, oblonga ad ovalia, oblique 

 obtuse bilobula, costa média supra sulcata subtus tenuiter promi- 

 nula, x'iridia, supra nitida, subtus opaca et dilutius viridia, c. 

 1.2—2 cm. longa, 0.6 — 0.85 cm. lata; vagina tubulosa, interno- 

 dium aequans, glabra, opaca, dilute viridis. Inflorescentiae ad 

 nodos caulium, vaginam dorso ad basin perforantes, brevissimae, 

 Itlorae, pedunculo cauli adpresso, c. 0.13 cm. longo, nonnullis 

 vaginulis tubulosis apicem versus accrescentibus donato, vaginula 

 summa subulato-acuminata. Bractea crasse apiculata, pallide 

 viridis. Flos parvulus, plane apertus, c. 1.3 cm. latus, sepalis 

 petalisque virescentialbis.. Sepalum dorsale cum ovario angulum 

 rectum faciens, subovatotriangulum, breviter acute apiculato- 

 acuminatum, interne convexum, superne concavum, intus opacum, 

 dorso nitidum, c. 0.0 cm. longum, 0.35 cm. latum. Sepala 

 lateralia lacinia longa angusta ad pedem gynostemii decurrentia, 

 mentum reversum cum ovario angulum acutum faciens conicum 

 rectum apice calcariforme obtusum nitidum album c. 0.4 cm. 

 longum formantia, margine antico basi longitudine c. 0.2 cm. 

 connata, parte antica patentia, oblique recurva, oblique triangula, 

 convexa, acute acuminata, costa média dorso prominula, intus 

 marginibus tantum dorso omnino nitida, c. 0.65 cm., usque 

 ad apicem menti 1.23 cm. longa, basi 0.7 cm. metientia. 

 Petala sepalis lateralibus parallela, oblique lanceolata, brevis- 

 sime acute apiculato-acuminata, convexa, bene 0.6 cm. longa, 

 0.225 cm. lata. Labellum ungue anguste triangulo c. 0.53 cm, 

 longo pedi gynostemii in formam calcaris adnatum, Slobum, 



