Planta epiphytica, usque ad 40 cm. alta, fere omnino 
glabra. Caules (vel pseudobulbi) contigui, erecti, anguste 
cylindrici vel anguste fusiformes, ancipites, usque ad 15 
em. longi, 0.5-1 cm. diametro, apice monophylli, basi 
‘ataphyllis lanceolatis usque ad 10 em. longis vaginati, 
radices flexuosas emittentes. Moliwm oblongo-ligulatum 
vel elliptico-ligulatum, apice brevissime aequaliter bilob- 
ulatum vel apiculatum, 10-27 cm. longum, 0.9-3.6 em. 
latum, basi breviter conduplicatum. Inflorescentia folio 
multo brevior, usque ad 10-flora; pedunculus 2.5—8 em. 
longus, teres, vagina lanceolata submembranacea omnino 
vel fere omnino circumdatus; racemus 1-4 em. longus; 
bracteae parvae, triangulares, acuminatae, usque ad 2.5 
mm. longae. Flores adscendentes, candidi, pulchri; ped- 
icellus 83-5 mm. longus; ovarium 10-12 mm. longum. Se- 
palum intermedium lanceolatum, acutum vel subacutum, 
8.5-10.5 mm. longum, 4.5—5 mm. latum; sepala lateralia 
oblique triangularia, breviter acuminata, margine postico 
(superiore) 15-17.5 mm. longo, pedi columnae adnata 
mentum galeiforme 8.5-11 mm. longum formantia; 
omnia sepala 5—7-nervia. Petala oblique oblanceolato- 
oblonga, apice subacuta, 8-10 mm. longa, 3-4 mm. lata, 
3—5-nervia. Labellum fere sessile, valde curvatum, e basi 
latiuscula ambitu obovatum, dimidio apicali=+ distincte 
trilobatum, 13-14 mm. longum, 8.5-10 mm. latum ; lobus 
intermedius triangularis, leviter acuminatus, 4.5—5 mm. 
longus, 4-5 mm. latus; lobi laterales rotundati vel ob- 
tusi; discus callo quadrato antice altiore instructus. Col- 
umna crassa, obtusa, 8 mm. longa, 3.6 mm. diametro, 
androclinio leviter excavato. 
Ucanna: Kigezi, Impenetrable Forest, 2100 m. alt., Sept. 1936, 
Eggeling 3308; Toro, Bwamba Pass, 2400 m. alt., August 1937, 
Eggeling 3361 (Tyrer). 
A very striking species with handsome pure white 
flowers. The nearest relative is apparently P. Doggettii 
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