280 
Thomé 4. Although the percentage of distribution appears to 
bear a relation to the distribution of forest too much stress 
should not be laid on these. results in any attempt at working 
out the endemic West African Forest elements in view of the 
varying intensity of investigation of the flora carried out in th 
different Upper Guinea colonies and protectorates. 
‘The periodic seasons of the species are little marked in the 
Cameroons, several flowering and fruiting throughout the year 
though the greater number appear to flower from January to 
April and August to September. Elsewhere in Upper Guinea 
the flowering period is chiefly December to May. There are but 
few records of fruiting. The information relative to the distri- 
bution and seasons in Upper Guinea for these species appears 
normal for a pantropic hydrophilous genus. 
After the revision of the Upper Guinea material the following 
new species and combinations resulted. The detailed key an 
records of the Upper Guinea species are being held over for 
subsequent publication. 
Dr. A. B. Rendle very kindly permitted examination of the 
undetermined material at the British Museum (Natural History) 
and several of the new species have been based on these specimens. 
In preparing a key to the 62 Upper Guinea species it was 
not found possible to follow any apparent natural divisions | 
which doubtless could be worked out were the whole genus 
being monographed. An artificial key had therefore to be 
arranged and the following abstract shows the relative places 
in it of the new Upper Guinea species. 
Leaf margin not spiny. 
Petals if reflexed, only at the tip. 
Leaves sub-auriculate at the base. 
Anthers subsessile - - - - - subauriculata 
Filaments distinct 
Lamina up to 15 em. long. 
Bracts of inflorescence about 2 mm. 
long, medianly pilose. 
Leaf margin entirely denticulate, 
main lateral nerves 9-12. Tree to 
20ft.high - - - =  ~« kibbiensis 
Lamina 20-30 cm. long. 
Stipules early deciduous. Flowers 
. long r 
- about 5 mm é - oblanceolata 
Leaves obtuse, acute or cuneate at the base. 
Sepals not markedly fanwise ribbed. 
Leaves glandular beneath. 
Inflorescence several cm. long. Ex- 
tremities covered with short rather 
stiff hairs, lamina oblanceolate, ab- 
ruptly acuminate. Sepals 2 mm. long. 
Ovary strigose-pilose - - punctata 
Ovary warted or later furfuraceous - verrucosa 
