Petals entire but with very broad semi-orbicular base; anther canals 
twice as long as stigmas H., trachypetala Kraenzlin 
Petals lobed, at least in the upper part; anther canals equalling or 
slightly exceeding the stigmas 
Petals divided to below the middle; middle lobe of lip slightly 
longer than the side lobes; spur not spirally twisted; rostel- 
lum middle-lobe much overtopping the column, truncate at the 
apex ‘ H. longirostris Summerhayes 
Petals divided irregularly in the upper part; middle lobe of lip 
much shorter than the side lobes; spur spirally twisted; ros- 
tellum middle-lobe equalling the anther, pointed at the apex 
H. pubipetala Summerhayes 
Of the three species Hi. /ongirostris occurs in Northern 
Nigeria and Uganda, H. trachypetala in southern 'Tan- 
ganyika Territory and Nyasaland, while H. pubipetala 
is so far known only from Nyasaland. 
Habenaria trachypetala Kraenzlin in Engler Bot. 
Jahrb. 80 (1901) 281. 
Habenaria rhombocorys Schlechter in Engler Bot. 
Jahrb. 58 (1915) 501. 
Comparison of the above indicates that they are con- 
specific. The flowers in Goetze 817 (type of H. trachy- 
petala) are smaller than in Schlechter’s type, but agree 
in this respect with specimens in the Kew Herbarium 
collected in [ringa Province, Tanganyika Territory and 
in Nyasaland. These latter match HZ. rhombocorys in 
structural details. It is therefore evident that there is 
considerable variation in flower size in this species. It 
should be pointed out that Schlechter’s description and 
the plate in Fedde Repert. Spec. Nov. Beih. 68 (1982) 
t. 88, Nr. 181 both give a wrong idea of the anther canals. 
These are described and drawn as very short, when never- 
theless an examination of the type gathering shows them 
to be long and narrow, at least twice as long as the 
stigmas. 
[ 265 ] 
