Recently, however, my attention has been drawn to 
two East African species, namely A neistrorhynchus laax- 
iflorus Manst., from the Uluguru Mountains in Central 
Tanganyika and Lustrostachys refracta WKraenzl., from 
Usambara in the north of the same territory. This lat- 
ter species was erroneously reterred to Cyrtorchis by 
Schlechter although Kraenzlin’s description clearly por- 
trays the characteristic rostellum of the two genera re- 
ferred to above. The interesting feature of these two 
species, which are evidently very closely allied, if not 
conspecific, is that they combine the supposed distin- 
guishing features of Aneistrorhynchus and Cephalangrae- 
cum. The inflorescences are relatively lax and elongated 
as in the former genus, whereas the leaves are similar to 
those in many species of the latter. The pollinarium is 
intermediate, the stipes being divided to the middle in 
L. refracta and nearly as far in A. laviflorus. 
It is evident, therefore, that the two genera cannot be 
maintained as distinct since all the supposed differential 
characters break down, while at the same time the ex- 
tremely striking rostellum remains almost constant 
throughout. It should be noted that in many of the 
species the lip is widened at the base forming large 
rounded but rather indistinct lobes, and indeed in few 
of the species is the lip clearly quite entire. An emend- 
ed description is provided herewith. 
Ancistrorhynchus inet in Mém. Soc. Bot. France 
9 (1907) 44-47—Schlechter in Beih. Bot. Centralbl. 36, 
Abt. 2 (1918) 187-139—Summerhayes in Hutchinson & 
Dalziel Fl. West Trop. Afr. 2 (1986) 462. 
Cephalangraeccum Schlechter |.c. 185-187—Summer- 
hayes l.c. 461-462. 
Epiphytic herbs; stems short and thick; leaves im- 
bricate, suberect, spreading or recurved, parallel-sided 
[ 208 | 
