64 Bulletin Jard. Bot. Buit enzorg, Série III, Vol. V. Livr. l. 



gynostemium bene superans, spathulatum, canaliculatum, appendice condu- 

 plicata auguste V^^^'n^' satis alta basi unguem paululum superante cruribus 

 antice decurrente et ad basin lamiiiae satis abrupte rotundato-terminante 

 in basi, basi 5nervium, expianatum c. 0.55 cm. longum, ungue oblongo, 

 c. 0.35 cm. longo, medio 0.16 cm. lato, lamina obreniformi, lobulis rotun- 

 datis sinu obtusangulo separatis minute crenulata, callo parvo infra sinum, 

 0.2 cm. longa, 0.275 cm. lata. Gynostemium ovarium continuum, rectum, 

 dorso convexum, margine in utraque stigmatis parte in auriculam patentem 

 rotundatam denticulo minimo instructam dilatatum, subtus medio ad basin 

 convexo-incrassatum, c. 0.175 cm. longum, clinandrio excavato, subsemior- 

 biculari cum costula longitudinali. Anthera breviter cordata, breviter obtuse 

 acuminata, utrinque dente breviore donata, basi leviter gibbosa, c. 0.08 

 cm. lata, Pollinia 6, inaequalia, oblique obovata, ad 0.03 cm. longa, stipite 

 0.06 cm. longo bipartito, laciniis oblique ellipticis. Rostellum e basi lata abrupte 

 contractum, 2dentatum. Stigma angulato-subsemiorbiculare. Pes gynostemii 

 cum ovario angulum acutum faciens, apice valde incurvus, late linearis, 

 marginibus erectis canaliculatus cum costa longitudinali a gynostemio 

 decurrente, c. 0.23 "cm. longus. Ovarium cum pedicello c. 0.05 cm. longum, 

 6sulcatum. 



Sumatra: West coast. Natal, Air Tagelang. (A. V. Theunissen, 

 cuit, in hort. E. JACOBSON, Fort de Kock, n. 1525). 



In some respects this species appears to be similar to A. nipcstris 

 RiDL. It differs, however, in the longer linear leaves and especially in tlie 

 form of the lip, which is described by RlDLEY and SCHLECHTER as 

 being ecallose. 



In the form of the lip A. Tlieunissenii much resembles A. torta Bl. 

 and A. babiensis J. J. S., but it is totally différent in habit. 



„Terrestrial. Bracts green vvith transparent margins. Ovary and pedicel 

 light green sometimes tinged with brownish purple, with a brovvnish purple 

 ring at the top of the ovary. Sepals and petals transparently light green, 

 the mentum v^hite hardly tinged with greenish. Lip vvhite. Column light 

 green, the stigma bordered purple. Rostellum with 2 purple spots. Anther 

 yellowish with a purple spot." (E. JACOBSON). 



Description from a plant preserved in alcohol. 



Àppendicula brevimentum J. J. S. in Bull. Jard. Bot. Buit. 3e sér. 

 il (1Q20), 36. 



Sumatra: West coast, Korintji Peak, 2000 m., epiphytical in forest. 

 (H. A. B. BuNNEMElJER n. 9562, April 1920). 



Though the material collecled on Korintji Peak is very poor, it proves 

 that the stems are branched. 



