- 30 - 



fere omnino integerritni, parte libéra c. 0.04 cm. longi; lobus iiitermedius 

 e basi subcuneato-contracta angulato-suborbicularis, apice obtusissimus 

 cum lobulo apicali brevi obtuso pallido, c. 0.225 cm. longiis, basi c. 0.1 

 cm., superne 0.18 cm. latiis. Gynostemium ciirvulum, dorso convexum, 

 pallide virescens, c. 0.26 cm. longum, alis lateralibus fere e niedio ortis, 

 patentibus. oblique incurviilis, quam alam apicalem multo brevioribiis, 

 oblique oblongo-subrhombeis, plus minusve acumina\is, margine superiore 

 dente patente subulato pollucem simulante interdum subnullo vel etiam 

 plus minusve elongato donatis, ala apicali porrecta, quadrangula, apice lato 

 rotundata c. Tdentata, clinaiidrio concavo, pede brevissimo, cum basi labelli 

 sacculum brevem a dorso compressuuj sulcatnm fuscum formante. Anthera 

 cucullata, breviter obtuse rostrato-acuminata, connectivo in gibberum conicum 

 recurvimi incrassato, c. 0.06 cm. laia. Pollinia 4, extus convexa, intus plana, 

 fiava.^ Rostellum magnum, patentissimum, triangulum. Stigma margine inferiore 

 rotundatum, margine superiore truncatum. Ovarium crassiusculum, breviter 

 obconicum, 6sulcatum, pallide viride, vix 0.1 cm. longum; pedicelius tenuior, 

 pallidior, c. 0.2 cm. longus. 



Sumatra: Palembang, Goenoeng Dempoe. (Exp. E. Jacobson 1916, 

 AjOEB, liv. pi. cuit, in Hort. Bog. sub n. 1411). 



Near D, sumatranum J.J. S. and D. longlbracteatiim Pfitz., but with 

 rather small flowers, the stelidia from the middle of the column, much 

 shorter than the terminal wing and provided with an incurved tooth. 



More material of thèse 3 allied species should be compared. 



Description from a cultivated spécimen. 



o D e n d r c h i 1 u m (sect. Platyclinis) r i g i d i f o M u m J. J. S. n. sp, 



Rhizoma repens. Pseudobulbi c. 1.5 cm. dissiti, crasse ovoidei vel 

 subglobosi, sectione transversa lateelliptici,obtiisi, 2.8— 3.3 cm. longi, 2.3- 

 2.5 cm. lati, Ifolii, innovationibus vaginis pluribus tubulosis amplectentibus 

 brevissime acute acuminatis superne arido-marginatis superioribus accre- 

 scentibns ad c. 9 cm. longis tectis. Folium erectum, lineare, apice suban- 

 gustatum, obtusum, basi sensim in petiolum angustalum, basi apiceque 

 obtusangule concavum, ceterum medio canaliculatum cum lateribus convexis, 

 5nervium, nervo intermedio dorso non prominente et nervis exterioribus 

 maxime conspicuis, nonnullis nervis tenuioribus intermixtis, crasse cori- 

 aceum, rigidum, c. 19.5—21 cm. longum, 1.5 — 1.65 cm. latnm; petiolus brevis, 

 canaliculatus, c. 2 cm. longus. Inflorescentia folio fere evoluto synantha, 

 folium superans, padunculo compresso, sectione transversa tlliptico, c. 25 

 cm. longo, 0,2 cm. lato, rachide subalato-quadrangula, c. 14 — 16 cm. longa, 

 internodiis c. 0.5—0.65 cm. longis. Bracteae alternatim bifariae, persistentes. 

 patentissimae, ovato-ovales, obtusae, marginibns involutis, ad c. 8 cm. 

 longae, superiores minores, intima rachide adpressa, sterilis. Flores majus- 

 culi, valde aperti. c. 1.65 cm. lati. Sepalum dorsale lanoeolatum, apicem 

 versus angustatum, subacutum, medio canaliculatum cum lateribus convexis, 

 3nervium, c. 0.85 cm. longum, 0.26 cm. latum. Sepala lateralia patentissima, 



J 



