44 BULLETIN JARD. BOT. BUITENZORQ, SÉRIE III, VOL. V. LiVR. 1. 



„Flowers greeii". (BiiNNEMEljER). 



Description from dried spécimens and flowers preserved in alcohol. 



' Dendrochilum (sect. Platycliiiis) rigidulum J. J. S. n. sp. 



Rhizoma valde ramosum. Pseudobiilbi approximati, cylindrici, obtnsi, 

 c. 2.5-3.75 cm. longi, 0.5—0.65 cm.' diam. (in sicco), vaginis superne 

 accrescentibus sicco dense prominenter nervosis et dense minutissime 

 elevato-puncticulatis opacis ad c. 4 cm. longis ad basin. Folinm sublineare, 

 apice subconduplicato subaciitum vel brevissime acutum, subpungens, basi 

 acuta in petiolum brevem canaliculatum c. 0.8 — 1.5 cm. longum angustatum, 

 rigidulum, nervis 5 — 7 sicco subtus prominentibus, totum c. 10 — 15 cm. 

 longum, 0.475 — 1 cm. latum (in sicco). Infiorescentia e pseudobulbo ma- 

 turo, erecta, superne nutans, laxius multiflora, pedunculo fiiiformi, c. 6.5 — 

 11.5 cm. longo, rachide leviter flexuosa, compresso-quadrangula, c. 12 — 

 18 cm. longa, internodiis c. 0.25 — 0.325 cm. longis. Bracteae ovarium 

 pedicellatum plus minus aequantes, amplectentes, late subovatae, obtusae, 

 vix apiculatae, basi contractae, 3nerviae, c. 0.37 cm. longae et latae, 2 — 4 

 inferiores stériles, àdpressae, imbricantes. Flores alternatim bifarii, patentes, 

 Sepalum dorsale subrhombeo-lanceolatum, acutum., 3nervium, c. 05 cm. 

 longum, 0.175 cm. latum. Sepala lateralia oblique oblonga, acuta, dorso 

 carinata, 3nervia, c. 0.5 cm. longa, fere 0.2 cm. lata. Petala subrhombeo- 

 lanceolata, acuta, 3nervia, c. 0.48 cm. longa, 0.16 cm. lata. Labellum 

 subtrilobum, concavum, 3nervium, callis 2 brevibus erectis lateraliter com- 

 pressis rotundatis postice lamella transversa postice incrassata rotundata 

 conjunctis ad basin, explanatum totum c. 0.44 cm. longum, hypochylio 

 transverse quadrangulo, basi utrinque in lobulum parvum rotundatum di- 

 latato, suberosulo, bene 0,2 cm. lato, lobo intermedio late ovato, acuminato, 

 acuto, margine papilloso, c. 0.3 cm. longo, fere 0.3 cm. lato. Gynostemium 

 brevissimum, dorso convexum, c, 0.13 cm. longum, cjla apicali transverse 

 quadrangula, apice leviter rotundata, denticulata, alis lateralibus infra mé- 

 dium jnsertis, apicali brevioribus, patentibus, oblique oblongis, apice di- 

 latatis, obtusis. PoUinia 4, oblique clavata. Rostellum triangulum. Stigma 

 margine inferiore valde elevato oblique cupuliforme. Ovarium brève, 

 6sulcatum, pedicello fere aequicrasso. 



Sumatra: Ophir districts, Goenoeng Talamau, north western slope, 

 1700 m. (H.A.B. BuNNEMElJER n. 767a, May 1917). Korintji Peak, 1200 — 

 1700 m , on trees in forest. (H.' A. B. BuNNEMElJER nrs. 8537, 8607, 891Q, 

 8958, 8960, 8990 and 9073, Mardi 1920). 



In gênerai tliis is similar to D. coniutum Bl., differing chiefly in the 

 short broad column arms and the form of the lip. 

 The flowers are described as light green. 

 Description from the dried Ophir spécimen only. 



