The lip is usually more or less quadrate with rounded 
base, the apex truncate and somewhat emarginate with 
a short central apiculus, and the margins normally irreg- 
ularly dentate especially in the anticous part. Sometimes 
the lip is narrowed towards the front, sometimes it is 
somewhat pandurate, while in other cases there is no ob- 
vious emargination. The spur is much narrowed at the 
base and obtuse at the apex. It varies from being the 
same length as the lip to a little more than half as long 
again. On the whole the western or ‘‘Upper Guinea’’ 
specimens have a relatively longer spur than those from 
the Congo basin region, but here again there is no sharp 
distinction. 
On the whole the evidence so far available does not 
appear to be sufficient to justify the recognition of two 
geographical varieties. 
Diaphananthe congolensis (De Wildeman) Sum- 
merhayes comb. nov. 
Mystacidium congolense De Wildeman Not. Pl. Utiles 
Congo 1 (1903) 151—Summerhayes in Blumea Suppl. 
1 (1937) 80, in obs. 
Rhipidoglossum rutilum Schlechter in Beih. Bot. Cen- 
tralbl. 36, Abt. 2 (1918) 81, partly. 
This species is closely allied to D. divitiflora (Kraenzl.) 
Schltr. and may eventually prove to be conspecific. At 
present I[ have not seen sufficient material of either spe- 
cies to make a definite decision. 
Diaphananthe fragrantissima (Reichenbach filius) 
Schlechter in Beih. Bot. Centralbl. 36, Abt. 2 (1918) 100. 
Lastrostachys fragrantissima Reichenbach filius in 
Flora 48 (1865) 190. 
Listrostachys Kirkii Rolfe in Dyer FI. Trop. Afr. 7 
(1897) 164. 
Lustrostachys falcata De Wildeman Not. Pl. Utiles 
Congo 1 (1908) 147. 
[101 J 
