— 112 — 



moneo pallide purpureo-maculato intus inter lobos; lobi latérales erecti, 

 apice recurvi, divaricati et convexi, falcato-subtrianguli, apice obtusi et 

 irregulariter marginati, margiiie postico rotundati, pallide flavescentes, extus 

 apice et margine postico excepte confluenter purpureo-tnaculati; lobus 

 iiitermediiis porrectiis. rectus, crassus, trigono-cylindricus, subtus planus, 

 apice obtusus, basi- supra excavatus, magnam partem niveus, basi praesertim 

 subtus confluenter purpureo-maculatus, supra ad basin pallide salmoneus^ 

 G. 0.7 cm. longus; saccus dorso pedem gynostemii contiiiuus, brevis, late 

 rotundatus, extus longitudinaliter 5costulatus, costa longitudinal! papillosa 

 intus a callo decurrente, flavescens, intus purpureo-partherinus, ex 

 apice usque ad apicem ovarii c. 0.6 cm. longus, ex apice ovarii 

 usque ad basin lobi intermedii (subtus) c. 0.5 cm. metiens. Gyno- 

 stemium brevissimum, truncatum, album, absque anthera c. 0.17 cm. 

 longum, clinandrio non excavato, gibbo parvo donato. Anthera cucullata, 

 subobreniformis, apice late retusa, tenuis, alba, c. 0.17 cm. lata, 

 PoUinia 4, valde inaequalia, in corpuscuta 2 oblonga trigona obtusa 

 antice convexa unita, albida, 2 postica multo minora, stipite brevi, cuneato- 

 quadrangulo, apice postice in appendicem erectam semiovalem producto, 

 albo, glandula parva curvata, tota c, 0.14 cm. longa. Rostellum brevissimum, 

 2dentatum. Stigma parvum, Pes gynostemii cum ovario angulum fere rec- 

 tum faciens, brevis, quadrangulus, concavus, flavescens, purpureo-maculatus, 

 bene 0.2 cm. longus, 0.27 cm. latus. Ovarium pedicellatum bsuicatum, 

 pallide viride, c. 1.1 cm. longum. 



Mentawei-Islands. (J. F. K. Hansen, cuit, in his garden in Buitenzorg). 



Amongst the species with caudate sepals and petals this is distinguislied 

 by the short and broad sac of the lip and the side lobes of the lip being 

 very much recurved al the apex. 



Description from a living plant, which Captain Hansfn put kindly 

 at my disposai. 



T h r i X s p e r m u m (sect. Katocolla) f 1 a c c i d u m J. J. S. n. sp. 



Caulis basi tantum radicans, elongatus, pendulus, flaccidus, ramosus, 

 apicibus incurvas, valde compressas serpentinus, pallide viridis, c. 75— 150 

 cm. longus, internodiis e basi angusta valde dilatatis, apice obliquis, c. 

 1.5—2.2 cm. longis, basi 0.2—0.25 cm., apice 0.7—0.85 cm. latis, ramis 

 patentissimis, radicibus apice aurantiacis. Folia patentia, recurvula ad 

 patentissima, oblonga ad lanceolata, marginibus parallelis vel plerumque 

 apicem versus plus minusve angustata, apice abrupte triangulo-contracta, 

 acuta, saltem initio subulato-apiculata, basi rotuîidata vel obtusa et abrupte 

 in partem petioliformem valde lateialiter compressam canaliculatam con- 

 tracta, obtusangule canaliculata cum sulco longiludinali, dorso obtusangule 

 convexa. carnosa, secundum costam crassissima, margines versus attenuata, 

 acute marginata, nitida, dilute viridia, adulta plus minusve opaca, c. 5—9 

 cm. longa, apice contracto c. 0.7 — 1 cm. longo, 1.5 — 2.75 cm. lata; petiolus 



