- ni — 



lunata bene 0.1 cm. lonp^o. Stigma profunde excavâtum. Pes gynostemii 

 ciim ovario angulum acutum facieiis, brevis, quadrangiilus, coiicavus, car- 

 nosus, Ovarium tenue, teres, 6sulcatiiiii, c. 0.9 cm. longum. 



Mentawei- Islaiids: Siberoct. (fl. P. Verschuur, cuit, in Hort. E. Ja- 

 COBSON, Fort de Kock, sub u. 1615). 



A species of the affinity of Th. arachnitcs RCHB. F., but with 

 larger flowers and a veiy long midiobe of the lip. 



„Stem compressed. Plant and bracts yellowish green. Pedicel very 

 light greenish yellow. Sepals and petals light greenish yellow. Lip with a 

 transverse ring of yellowish browii dots, inside dotted with yellowish brown, 

 midiobe pure white, spur with a faint brownish hue, inside with large 

 brownish purple dots. Column white, dotted with brownish purple beneath, 

 anlher whitish."' (E. Jacobson). 



Description from a leaf and inflorescence preserved alcohol.- 



Thrixspermum (sect. Orsidice) I a t i s a c c a t u m J. J. S. n. sp. 



Caulis compressus, c. 13 cm. longus, internodiis c. 0.8- 1.6 cm. lon- 

 gis. Folia subpatentissima, lorato-lanceolata, apice recurva breviter contracta 

 et obtuse bilobula, mucrone breviore primum interposito, basileviter angus- 

 tata, supra in utraque parte costae mediae supra sulcatae subtus inconspciue 

 late obtuse incrassatae apice subcarinatae convexa, carnosa, novella nitida, 

 viridia, parce nigro-punctata, c. 8—13.5 cm. longa, 1.5- 2,4 cm. iata; vagina 

 tubulosa, compressa, apice obliqua, quam laminam densius punctata, inter- 

 nodium subaequans, ad c. 0.675 cm. Iata. Inflorescentiae vaginam dorso ad 

 basin perforantes, patentes, multiflorae, diu florentes, flores 1—4 simul 

 gignentes, pedunculo sectione transversa elliptico, apice dilatato, viridi, 

 atroviolaceo-punctato, c. 3.5-7.5 cm. longo, 0.15 cm., apice ad 0.55 cm. 

 lato, vaginulis c. 3 brevibus tubulosis carinatis ad c. 0.6 cm. longis donato, 

 rachide pedunculo crassiore, compressa, nitide viridi, atropurpuree punc- 

 tata, 4 cm. superante, c. 0.45 cm., cum bracteis 1 — 1.1 cm. Iata, internodiis 

 facie florem versus spectante cum basi bracteae excavatis, c. 0.25—0.35 

 cm. longis. Bracteae alternatim bifariae, erecto-patentes, leviter falcato- 

 incurvae, deinde paulo remotae, triangulae, arcte conduplicatae, acutae, basi 

 rachidem plus quam semiamplectentes, conspicue carinatae, dorso ad basin 

 excavatae, dorso vix curvatae et continuae, carnosulae, membranaceo-mar- 

 ginatae, colore rachidis, margine antico c. 0.7—0.8 cm. longae. Flores 

 majusculi, odorati, ephemeri, sepalis petalisque reflexis, linearibus, acutis, 

 concavis, pallide flavescentibus, c. 4 cm. longis. Sepalum dorsale basi 

 c. 0.35 cm. latum. Sepala lateralia brevissime ad pedem gynostemii de- 

 currentia, basi falcata sursum curva, basi 0.35 cm. Iata. Petala angus- 

 tiora, 0,23 cm. Iata. Labellum porrectum, saccatum, 31obum, usque ad 

 apicem ovarii c. 1.2 cm. longum, ex apice loborum lateralium usque ad 

 apicem sacci 0.75 cm. metiens, omnino celluloso-papillosum, callo trans- 

 verso aequilateraliter trapeziformi apice incurvulo et truncato pallide sal- 



