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supra basin subrectaiigule recurvum, apice recurvulum, 31obum, 3costatum, 

 costis exterioribus 2/5 partibus inferioribus parallelis rectisqtie deinde bene 

 undulatis satis altis in '/s parte infra apicem in costulam humilem rectam 

 apicem fere attingentem abrupte exeuntibus, costa tertia multo minore 2/5 partibus 

 inferioribus recta deinde ieviter undulata ad basin lobi interniedii in costulam 

 humilem producta, pallide flavescens, basi rubro-puiictatum, explanatum c. 

 1.63 cm., usque ad apicem loborum lateralium 0.9 cm. longum, ad lobos 

 latérales 1 cm. latum; lobi latérales erecti, gynostemium bene superantes, 

 oblique trianguli, obtusi, margine antico truncati repanduli, margiiie postico 

 rotundati; lobus intermedius niagnus, uiiguiculatus, c. 0.875 cm. longus, 

 ungue quadrangulo, medio constricto, undulato, crenulato, apice 0.5 cm. 

 lato, lamina transverse quadrangula, valde plicata, utrinque irrégularité r 

 trilobula, repanda, apice laie subtruncata cum dente brevi late triangulo, 

 c. 0.65 cm. longa, 1.3 cm. lata. Gynostemium cum ovario angulum obtusum 

 faciens, dorso convexiim, subtus planum, album, c. 0.45 cm. longum, clinan- 

 drio alte excavato, fiiamento subulato, auriculis antliera multo brevioribus, 

 triangulis, dentatis. Anthera alte cucullata, ambitu longior quam lata, 

 quadrangula, apice triangulo-producta obtusa et puberula, fascia longitudinali 

 lata convexa, alba, c. 0.15 cm. lata. Pollinia 4, lateraliter compressa, curvata, 

 linearia, semipellucide ochrascentia, 0.12 cm. longa. Stigma fere ad basin 

 gynostemii, longitudinale, ovale. Pes gynostemii cum ovario angulum obtusum 

 faciens, oblongus, obtusus, concavus, dorso convexus, pallide flavus, Ieviter 

 rubro-punctatus, c. 0.45 cm. longus. Ovarium 6sulcatum, flavescens. minute 

 fusce furfuraceo-puncticulatum, cum pedicello brevissimo c. 0.7 cm. 

 longum. 



Bornéo: Goenoeng Labang. (Expédition for rectification of the frontiers 

 in North Bornéo, Mantri Amdjah liv. pi. cuit, in Hort. Bog.) 



Amongst the species allied to D. Macraei Lndl. with a short mentum 

 this is to be distinguished by the broad leaves, differently coloured flowers, 

 the proportionally broad hypochyl, the keels being produced higher up, 

 the blade of the midlobe not or hardly being dilated upward, the anther 

 being longer than broad. 



Description from a cultivated not full grown spécimen. 



Dendrobium (sect. Desmotrichum) m a c u 1 o s u m J. J. S n. sp. 



Rhizoma validum, elongatum, repens, ramosum, cylindricum, nitide 

 viride, deinde viridiflavum, c. 0.75 cm. diam., internodiis c. 0.&— 1.2 cm. 

 longis, radicibustenuibus. Gaules c.6 — 7cm.dissiti,adscendentes,'bene ramosi, 

 nitidissimi, dilutius flavo-virides, deinde longitudinaliter sulcati, ad c. 60 

 cm. longi; caulis primarius interne teres, superne sectione transversa ovalis, 

 totus c 12-14 cm. longus, interne c, 0.45 cm., apice ad c. 0.7 cm. diam , 

 internodiis c. 2.2—2.6 cm. longis, internodio ultimo in pseudobulbum com- 



