sum. Columna semiteres, 2.5 mm. alta, androclinio leviter 
excavato, pede 3 mm. longo; anthera transverse elliptica, 
convexa, apice breviter apiculata. 
Be.taian Congo: Virunga Mts., Namlagira, eastern slope, 2250 m. 
alt., common in forest, Jan. 1931, Burtt 3132 (Type). 
Uaanpa: Kigezi, Sept. 1936, Eggeling 3262. 
A further species belonging to the group within sect. 
Cultriformes possessing long slender stem-like pseudo- 
bulbs and narrow leaves. ‘The flowers are grouped in short 
5-10-flowered racemes of which there may be only one 
or several close together. Many of these branch racemes 
fail to develop, being represented by buds in the axils of 
the lower bracts. 
Polystachya (§. Cultriformes) subdiphylla Swm- 
merhayes sp. nov.; ab omnibus aliis speciebus sectionis 
pseudobulbis brevibus ampullaceo-conicis, cataphyllo su- 
premo foliaceo fere folium secundum formanti, folio 
anguste oblanceolato 2—5 cm. supra pseudobulbum dis- 
articulato, racemo brevissimo paucifloro differt. 
Herba terrestris, 20-85 cm. alta, fere omnino glabra; 
radices flexuosae, 1-2 mm. diametro; pseudobulbi con- 
tigui vel fere contigui, basi sympodium breve repens 
formantes, superne erecti, ampullaceo-conici vel anguste 
ovoideo-conici, 2-4 cm. alti, 5-10 mm. diametro, apice 
monophylli, cataphyllis 2-8 suprema foliacea apice tri- 
apiculata pseudobulbum valde superantia et folii basin 
arcte vaginantia vestiti. F’oliwm anguste oblanceolatum 
vel ligulato-oblanceolatum, apice acutum vel subacutum, 
basi sensim angustatum, 2-5 cm. supra apicem pseudo- 
bulbi articulatum, supra articulum 15-25 cm. longum, 
11-17 mm. latum. Jzflorescentia folio brevior; pedun- 
culus teres, laevis, 8-16 cm. longus, ebracteatus ; racemus 
brevissimus, fere capitatus, rachide 1-2 cm. longa, usque 
ad 4-florus. F/ores adscendentes, albi, labello rubro- et 
[ 294. ] 
