tota 15-16.5 mm. longa; pars receptiva 5—-8.5 mm. longa, 
leviter incrassata,antice applanata; rostelli lobus inter- 
medius rotundato-triangularis, brevissimus, carnosus. 
Kenya Cotony: Mt. Elgon, Sosian River, 2100 m., in bush country, 
May 19387, Tisdall in Tweedie 8387; Mt. Elgon, 2250 m., in grassland, 
May 1920, Lindblom (Herb. Stockholm); Mau, 2400 m., Battiscombe 
1220(Tyrr); Londiani, south of Eldama Ravine, 2370 m., July 1933, 
Graham 3227; Western foot of Aberdare Mts., near L. Olbolossat, 
1950-2100 m., Dowson 642; Aberdare Mts., Kinangop, 2640-2670 
m., in crevices between rocks close to marshy area above river, April 
1938, Chandler 2399. 
This species, which I had previously confused with 
HZ, praestans Rendle, differs by the characters given in 
the diagnosis. Perhaps the most important of these is 
the relatively narrow anther-connective, this being about 
half as wide as in HZ. praestans. The latter species has 
not yet been recorded in Kenya Colony where it is ap- 
parently replaced by Hi. keniensis. 
Habenaria macrantha Hocihstetter ex A. Richard 
Tent. Fl. Abyss. 2 (1851) 294, t. 87. 
I have always found difficulty in obtaining a clear con- 
cept of this species by a cursory examination of the speci- 
mens cited by Rolfe in the Flora of Tropical Africa (vol. 
7, p. 224). A careful examination, however, has led me 
to conclude that several different species are represented 
under these gatherings in the Kew Herbarium. Of these 
Schimper 626 is very close to HZ. keniensis Summeth., 
described above, being perhaps an abnormal specimen 
with a much enlarged basal part of the spur. The charac- 
teristic feature of true H. macrantha (Schimper 1256) lies 
in the fusion of the base of the spur to the anther con- 
nective, on which fusion the lateral sepals and petals 
are borne, the mouth of the spur thus being hidden and 
not very obvious. This is well shown in Richard’s plate. 
In addition the stigmatic surfaces are shorter and more 
Ben 
