flavo-signato; pedicellus cum ovario 1—1.6 em. longus. 
Sepalum intermedium lanceolatum, acuminatum, circiter 
1.5 ecm. longum et 5.5 mm. latum, 5-nervium; sepala 
lateralia recurvatim patentia, oblique ovato-triangularia, 
breviter caudato-acuminata, circiter 1.5 cm. longa, 9 mm. 
lata, basi pedi columnae adnata mentum 7 mm. longum 
formantia. Petala oblanceolata, breviter acuminata, 1.25 
em. longa, 4-4.5 mm. lata. Labellum superne valde 
recurvatum, vix unguiculatum, trilobatum, 1-1.2 em. 
longum, 1.1—1.2 cm. latum; lobus intermedius trans- 
verse ellipticus, apice dorsaliter longe apiculatus, 5-6 
mm. longus, 6.5—-7 mm. latus, pilis flavidis vestitus; lobi 
laterales+erecti, incurvatim subovati, rotundati, parte 
libera 8-4 mm. longa et 4-5 mm. lata, rubro-striati; dis- 
cus callo humili ligulato apice obtuse triangulari instruc- 
tus. Columna brevissima; anthera galeiformis, crista 
integra laevi coronata., 
TANGANYIKA TeRRITORY: Uluguru Mts., Morogoro, Kinolo Road, 
1890 m. alt., in dwarf “‘mtani’’ forest, April 1935, Bruce 982. 
A very striking species which I have placed in sect. 
Cultriformes on account of the one-leaved pseudobulbs, 
but which seems to have no close allies there. The flowers 
resemble more closely those of sect. Affines but only the 
lip is hairy. Interesting features are the very long upper 
sheath which is wrapped round the base of the leaf and 
seems almost to be a further half-developed leaf, and the 
articulation of the leaf itself which is at least 2 cm. above 
the apex of the pseudobulb. On the falling of the blade, 
the base, which is 2-5 cm. long, remains attached to the 
pseudobulb. In other species of sect. Cultriformes this 
persistent leaf-base is never more than about 5 mm. long 
and is usually much shorter. 
Polystachya (§. Cultriformes) aconitiflora Swm- 
merhayes sp. nov. +; aftinis P. caespitificae Kraenzl., aqua 
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