14. Thrixspermum angustatum L. O. Williams 
sp. nov. 
Herba epiphytica. Caules plusminusve 5 cm. longi, 
vaginis foliorum obtecti. Folia lineari-oblonga, obtusa, 
coriacea, disticha. Inflorescentia densiflora. Sepalum dor- 
sale angustissime rhombicum. Sepala lateralia elliptico- 
lanceolata. Petala oblanceolata, obtusa. Labellum trilo- 
batum. Columna generis. 
Anepiphytic herb with numerous fibrous roots. Stems 
mostly more than 5 cm. long, covered with persistent 
leaf-sheaths. Leaves distichous, linear-oblong, obtuse, 
mostly about 7 mm. apart, rather thin for the genus, 
about 4-7 em. long and 0.5—-1 cm. broad. Peduncles 
much exceeding the leaves (mostly about twice as long), 
usually with a single sterile bract much below the in- 
florescence. Inflorescence densely flowered, 0.5-8 em. 
long. Bracts of the inflorescence about 2 mm. long, ap- 
parently rather fleshy when fresh, neither subulate nor 
aristate. Dorsal sepal very narrowly rhombic, obtuse, 
3-nerved, about 8 mm. long and 2.5 mm. broad. Lateral 
sepals elliptic-lanceolate, acute, 8-nerved, about 6 mm. 
long and 2.5 mm. broad. Petals oblanceolate, obtuse, 
3-nerved, about 6 mm. long and up to 1.5 mm. broad. 
Lip 3-lobed, with a single emarginate callus (free only 
at the apex) at the orifice of the spur; lateral lobes slight- 
ly arcuate, obtuse, subglandular-pubescent on the mar- 
gin; mid-lobe oblong, obtuse, canaliculate, about 3 mm. 
long, covered throughout with a fine pubescence, much 
exceeding the lateral lobes; spur directed slightly for- 
ward, about 4.5 mm. long from the junction with the 
sepals to the tip. Column characteristic of the genus. 
Thrivspermum angustatum has been confused with 
T. Wenzel Ames to which it is doubtless most closely 
allied. From 7°. Wenzelii it may be distinguished by the 
peduncles being more than twice as long as the leaves, 
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