Smith : Orchidaceae novae MaLayenses X, 63 



apicem versus sensim angustatum, acutiiin, iiitiis iiicrassatioiiibus 2 

 longitudinalibus convexis luimilibus iiistructiim, 3ncTviLim, basi appendicibus 

 2 reversis divergentibus plus miiiusve incurvis liiiearibus subteretibus ob- 

 tusis c. 0.07 cm. longis doiiatum, c. 0.16 cm., cum appeiidicibu^^c. 0,23 cm. 

 longum, laniiiia 0.075 cm. lata. Gyiiosfemium brève, 0.13 cm. longum, 

 clinandrio alte excavato, filameiito deiitiformi, auriculis ad basin rostelli 

 utrinque deiitem formaiitibus. Aiithera cucullata, triangula, apice altius triden- 

 tata, dente intermedio paulo longiore et angustiore, basi leviter exciso-trun- 

 cata, connectivo leviter trianguio-gibboso, c. 0.08 cm. longa. Rostellum 

 porrectum, triaugulum, alte acute bidentatum. Stigma alte excavatum, subor- 

 biculare. Pes gyiiostemii ovario adpressus, tenuis, linearis, inferrie longitudine 

 c. 0.14 cm. sepalis lateralibus adnatus, parte superiore (vel ungue labelli?) 

 libéra, sursum curva. Ovarium pedicellatum c. 0.175 cm. longum. 



Sumatra: West coast, Korintji Peak, 1500—1700 m., epiphytical in 

 forest, common. (H. A. B. BiiNNEMEijER nrs. 8531, 8690, 8719, 8789, 8905, 

 Mardi 1920). 



A distinct species allied to P. tenuis Lndl. and P, serpylUfoiius Lndl. 



The flowers are purple with a white mentum. 



Description from herbarium and inflorescences preserved in alcohol. 



Appcndicula Theunissenii J. ). S. n. sp. 



Gaules approximati, simplices, tenues, teretes, c. 23 cm. longi, bene 

 0.2 cm. diam., internodiis c. 0.7—0.9 cm. longis. Folia patentia, basi leviter 

 torta, recurvula, linearia, apicem versus angustata, inaequaliter bidentata 

 cum mucrone longiore interposito, inferne obtusangule canaliculata, costa 

 média supra sulcata subtus prominente, nervo 1 conspicuo utrinque, papyracea» 

 ad c. 6 cm. loiiga, 0.55 cm. lata; vaginae tubulosae, apice antice excisae, 

 internodia bene superantes. Inflorescentiae terminales et e nodis superioribus, 

 recurvulae, paulo ramosae, laxe pluiriflorae, 2 cm. superantes, pedunculo 

 c. 0.9 cm. longo, nonnullis vagiiiulis adpressis donato. Bracteae reflexae, 

 ovatae, acutae, concavae, 3nerviae, ad c. 0.34 cm. longae, superiores 

 minores et relative latiores. Flores c. 0.55 cm. longi, sepalis petalisque 

 conniventibus. Sepalum dorsale ovarium fere continuum, oblongo-triangulum, 

 obtusiusculum, concavum, 3nervium, c. 0.34 cm. longum, 0.2 cm. latum. 

 Sepala lateralia lacinia oblique late quadrangulo-oblonga concava ad pedem 

 gynostemii decurrentia, mentum reversum cum ovario angulum acutum 

 faciens oblongo-ovale subcylindricum apice rotundatum c. 0.24 cm. longum 

 formantia, margine antico libéra, parte antica divergentia, oblique triangula, 

 acuta, leviter apiculata, 3nervia, costa média dorso prominente, bene 0.3 

 cm., usque menti apicem 0.5 ciri. longa, basi 0.34 cm. metientia. Petala 

 parallela, oblique oblonga, apicem versus sensim paulum dilatata, obtusa, 

 brevissime obtuse apiculata, apice suberosula, Inervia, c. 0.3 cm. longa, 

 0.12 cm. lata. Labellum erectum, pedi gynostemii adpressum, recurvulum, 



