Examination of the type gatherings of the above two 
species and of about twenty other gatherings reveals no 
essential structural differences. There is some variation 
in the petals which may be either obtuse or somewhat 
acute at the apex, may have a sort of bulge or corner on 
the anticous margin in the lower part, and may be either 
entirely glabrous or puberulous in the lower half. The 
West African H. Mannu Hook. f. is very closely allied 
to H. praestans, differing in the much darker (almost 
black) colour assumed on drying and the narrower, thick- 
er, apparently deeply V-shaped leaves, which never flat- 
ten out when dried but fold so as to show one half only. 
As there are practically no floral differences perhaps the 
two species may be better treated as geographical forms 
or subspecies of one widely-ranging species. On the other 
hand, the very hairy lip-claw and main segments and the 
slenderly stalked capitate or clavate-capitate staminodes 
distinguish both species from the species described below 
(HZ. keniensis Summerh. ). 
Habenaria (§. Multipartitae) keniensis Swmmer- 
hayes sp. nov. ; affinis H. praestanti Rendle, a qua planta 
siccitate pallidiore, foliis pro rata brevioribus et latioribus, 
floribus paulo minoribus, petalis magis pubescentibus et 
ciliatis, labelli segmentis primariis papillato-puberulis nec 
pubescentibus, antherae connectivo duplo angustiore, 
staminodiis sessilibus, brachiorum stigmatiferorum parte 
libera fere duplo longiore facile distinguenda. 
Herba terrestris, 20-65 cm. alta; tubera ovoideo- 
ellipsoidea, 2.5 cm. longa, 1-1.5 em. diametro. Caulis 
erectus, teres, glaber, usque ad inflorescentiam + regu- 
lariter 6—7-foliatus, basi usque ad fere 1 cm. diametro. 
Folia 1-2 infima ad vaginas redacta, cetera lanceolata 
usque ovata vel elliptico-ovata, acuminata, basi breviter 
vaginantia, usque ad 15 cm. longa et 6 em. lata, sursum 
[ 270 | 
