descriptions of the above reveals no essential structural 
differences between them. There is considerable variation 
in habit, the type collection of HZ. combusta consisting of 
rather stunted specimens, while that of HZ. Rendlei in- 
cludes very slender and narrow-leaved forms. All these, 
however, can be paralleled among material collected in 
Kenya Colony and Uganda and often two or more of the 
above ‘‘species’’ have been found mixed together. The 
petals vary a good deal in shape but often show great 
diversity on the same plant or indeed in the same flower! 
Throughout all the variations mentioned the general 
flower-structure remains unaltered, characteristic features 
being the trilobed lip with its large rounded basal auricles 
and recurved side-lobes, the club-shaped bordered stigmas 
adpressed to the lip-disk, and the large folded hooded ros- 
tellum standing in front of the contiguous anther-loculi. 
As I pointed out in a previous paper (Bull. Mise. Inform. 
Kew (1938) 251), H. peristyloides is quite different in 
column characters from the genus Roeperocharis, to 
which it bears a strong resemblance. 
The distribution of the species is Abyssinia, Uganda, 
Kenya Colony, and southern Tanganyika Territory. It 
occurs in grass-lands between 5500 and 10,000 feet (1650- 
3000 metres) above sea level. 
Habenaria ($. Commelinifoliae) coeloglossoides 
Summerhayes sp. nov. ; aftinis H. obovatae Summerhayes, 
a qua floribus majoribus, petalis late ovatis margine antico 
unidentatis, labelli ungue ac lobis lateralibus quam inter- 
medio longioribus, caleari dimidio superiore nec apice 
tantum inflato, antherae canalibus ac pollinii caudiculis 
brachia stigmatifera superantibus, rostelli lobo intermedio 
majore differt. 
Herba terrestris, tubera et radices non visa. Cazrlis 
erectus, racemo incluso 15-40 cm. altus (ad 60 cm. fide 
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