THE FLORA OF LIBERIA. S1 
as a section, with rather artificial boundaries, of the great natural 
region which extends from the Senegal in the north to the 
Kunene in the south. Its flora has, no doubt, a strong local 
colouring, but it is rather of the specific than the generic 
order. Its nearest affinity is, of course, with Sierra Leone, 
and not a few of the species described here are representative 
forms of that country. Even three of the four new genera 
proposed by me are not endemic in Liberia. One, Urobotrya, 
extends to Sierra Leone, whilst the other two, A£rovxima and 
Afrodaphne, range over a stil greater portion of West Africa 
aud comprise species hitherto referred to old genera. 
Finally, I have to remark that the whole of Whyte’s and 
Sim’s collections were presented to Kew by Sir H. H. Johnston, 
and to thank Mr. C. B. Clarke and my colleagues Messrs. N. E. 
Brown, T. A. Sprague, and C. H. Wright for their help in 
working out certain orders, and Dr. James Clark for his assist- 
ance in dissecting species which had to be taken into account for 
purposes of comparison. 
The sequence of genera is that of Bentham and Hookers 
* Genera Plantarum. 
Tetraceras leiocarpa, Stapf (sp. nov.); affinis T. potatorie, 
Afz., a qua differt imprimis carpellis glaberrimis vel pilis paucis 
minutis aspersis, folliculis levissimis, arilo magis lacerato, 
semine fere duplo majore. 
Folia et panicule ut in T. potatoria nisi folia glabra vel subtus 
parcissime pilosa. Sepala 5-9, late rotundato-elliptiea, majora 
3 lin. longa, extus glabra vel sparse minute pubescentia margine 
ciliata, intus sericeo-tomentosa. Petala 2-3, elliptica, caducis- 
sima. Carpella circiter 4, glaberrima vel pilis paucis minutis 
aspersa. Folliculi obovoidei, abrupte in cuspidem (stylum 
persistentem) contracti, 3 lin. longi, lævissimi, nitidi, olivacei, 
Semina subglobosa, ad 23 lin. dimetientia, testa rugosa, arillo 
pallido ad vel ultra medium lacerato, laciniis tenuibus. 
Karkatown, Whyte. 
The follicles of T. potatoriu are very conspicuously sulcato- 
striate, and the largest seed I have seen was only 14 lin. long. 
Popowia Whytei, Stapf (sp. nov.); affinis P. Vogelii, Baill., 
differt foliis firmioribus subtus vix glaucis, floribus sericeo- 
tumentosis. 
