102 SOUTH NIGERIAN PLANTS 
4 tubuliformibus distantibus instructo superne flexuoso et 
florifero ; bracteis ovato-acuminatis scariosis pedicellum brevem 
cum ovario paullo excedentibus; sepalis triangulari-caudato- 
acuminatis; petalis ellipticis apiculatis ; labello e basi hastato- 
cordata anguste oblongo-triangulari acuminato margine ciliolato, 
disco jugis binis superne convergentibus instructo ; columna brevi 
processubus binis subulatis instructa. (Pl. 12, figs. 11, 12.) 
Oban ; n. 952. 
Pseudobulbs "5 cm.—"7 em. long on the nodes of a slender branching 
raceme forming a cespitose mass. Leaves 5-8 em. long, 3:5-4 cm. 
broad. Scapes to 13 cm. long, with 3-4 distant tubuliform bracts 
below and bearing up to about ten flowers on the upper zigzag 
portion. Flowering bracts about 2 mm. long. Sepals 8 mm. long; 
the lateral 175 mm. broad at the base; the dorsal just over 1 mm. 
Petals 2 mm. long by. ‘8 mm. broad ; lip 2:25 mm. long by 1:25 mm. 
broad at the base. Column barely 1 mm. long, bearing a pair of long 
subulate processes. 
Near B. intertextum Lindl. (Niger Delta) and B. viride Rolfe 
(Sierra Leone), but distinguished at once by the long narrow linear 
leaves, and also by minute floral details. 
Polystaehya obanensis Rendle sp. nov. Rhizoma lignosum 
flexuosum complanatum ascendens, radicibus numerosis et pseudo- 
bulbis marcescentibus seriatim approximatis instructum ; pseudo- 
bulbo compresso 4-angulato binodo, quoque folium singulum 
anguste oblongum saepissime basin versus angustatum et scapum 
terminale gerente; inflorescentia puberula basi bractea mem- 
branacea apice subacuta arcte vaginata superne laxe ramosa, 
bracteis superioribus e basi ovata longe acuminatis ; floribus siccis 
luteis puberulis; sepalo dorsale anguste elliptico acuto 3-nervio, 
sepp. lateralibus triangularibus acutis mentum obtuse obconicum 
efformantibus ; petalis lineari-oblanceolatis acutis ; labello e basi 
unguiculata trilobato, lobis lateralibus brevibus rotundatis, lobo 
medio suborbiculari apiculato disco incrassato ; columna brevi 
crassa. (Pl. 13, figs. 1, 2.) 
Oban ; n. 930. ' 
Plant 20-25 cm. high. Rhizome 4-5 mm. broad to 12 cm. long 
in the specimens collected, internodes 1:5-2 em. long. Pseudobulbs 
35-4 em. long, to 1*5 em. broad, enveloped below by the persistent leaf- 
sheaths, and bearing its leaf a little below the apex. Leaf 8:5-14 cm. 
long, 1:3-2 cm. broad. Peduncle 4*5-5:5 em. long; sheathing bract 
2-8 em. Panicle 6-11 em. long, usually with two branches. Fertile 
bracts 5-6 mm. long. Dorsal sepal 6:5—1:5 mm. long, 2°5-2°6 mm. 
broad; lateral seps. 7°5-8°5 mm. long; chin 4 mm. long. Petals 
6-6°5 mm. long, 1:5 mm. broad; lip 7:5 mm. long, 6 mm. broad, 
with an upwardly broadening thickening from the base to a little 
below the middle, and a central thickening on the apical lobe. 
Column 2 mm. long. ; 
. Apparently near P. epiphytica De Wild. (from Katanga), but 
istinguished by its larger flowers and lip-characters. ; ME 
