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approxinntis erectis applicatis et supra basiii unguis abrupte terminantibus, 

 subtus inconspicue sulcatuin, totum explanatum, c. 2.35 cm. loiigum, uiigue 

 pedi gynostemii adpresso, leviter sigmoideo, lineari, cafialiculato, c. 1.1 cm. 

 longo, 0.3 cm. lato, lamina cum ungue angulum obtusum faciente, marginibus 

 ^/g partium inferiorum revolutis ambitu obverse quadrangula, apice 21oba, 

 lobulis iiicurvis antice concava, superne undulata, erosa, tenui, nivea, expla- 

 nata cuneato-obcordata, lobis rotundata cum apiculo parvo obtuso in sinu, 

 c. 1.3 cm, longa, fere 1.1 cm. lata. Gyiiostemium brève, crassum, supra 

 visum quadratum, ceraceo-album, c. 0.34 cm. loiigum, auriculis crassis, 

 oblique quadrangulis, truncatis, margiue superiore in dentem triangulum 

 acutum tenuem productis, nitide aurantiacis. Authera cucullata, antice visa 

 quadraiiguia, dorso rotundata et retusa, apice truncata et utrinque in dentem 

 parvum exeuns, glabra, alba. c. 0.2 cm. lata. Pollinia 4, inaequalia, supra 

 convexa, oblonga, nitide citrina, c. 0.12 cm. longa. Stigma rhombeum vel 

 melius quinquangulatum, apice truncatum. Pes gynostemii cum ovario 

 angulum anguste acutum faciens, leviter sigmoideus, linearis, canaliculatus, 

 apice lamella reverse 2dentata donatus, ochrascens, c. 0.95 cm. longus. 

 Ovarium ôsulcatum, flavescens, vix purpureo-suffusum, c. 0.7 cm. longum, 

 cum pedicello aequilongo sigmoideum. 



Sumatra: Craterwall of the Manindjau-lake, 600—800 m., on trees, 

 (E. Jacobson, cuit, sub n. 560). 



From the allied species this is easily distinguished by the very narrow 

 leaves. The flowers resemble much those of D. cinereum J. J. S. 

 Description from a living spécimen. 



Dendrobium (sect. Calcarifera) M a i e r a e J. J. S. n. sp. 



Caules approximati, penduli, flexuosi, teretes, satis tenues, basin 

 apicemque versus leviter attenuati, deinde sulcati, virides, ad c. 50 cm. 

 longi, medio ad 0.56 cm., basi 0.2 cm. diam., internodiis 2—3.5 en:, 

 longis. Folia decidua, lanceolata, apicem versus sensim angustata, valde 

 oblique acuta, basi angustata et semitorta, margine recurvula, costa média 

 supra sulcata subtus tenuiter prominente, membranacea, nitidule viridia, 

 c. 9—11.5 cm. longa, 1.25—2.1 cm. lata; vaginae tubulosae, internodia paulum 

 superantes, prominenter nervosae, furfuraceo-punctatae. Inflorescentiae e 

 nodis caulium defoliatorum, brèves, plerumque 2florae, pedunculo tenui, 

 tereti, pallide viridi, c. 0.9 — 1 cm. longo, nonnullis vaginulis 

 tubulosis ad basin, rachide tenui, pallide viridi, c. 0.5—0.6 cm. longo. 

 Bracteae adpressae, triangulae, acutae, concavae, flavidae, c. 0.25 cm. 

 longae. Flores médiocres, nitidi, ochroleuci, c. 3.6—3.8 cm. longi, 2.6—3.3 

 cm. lati. Sepalum dorsale erectum, ovale ad ovatum, obtusum. convexum, 

 marginibus inferne concavum, c. 1.43—1.6 cm, longum, 0.9 0.85 cm. 

 latum. Sepala lateralia lacinia elongata oblique lineari-oblonga concava ad 

 pedem gynostemii decurrentia, mentum eiongatum lateraliter compressum 

 anguste calcariforme cum ovario angulum acutum vel fere rectum faciens 



