FLORA NIGRITIANA. 241 
duplo longioribus, staminibus styloque exsertis.—Sierra Leone, 
Don. 
Although at first sight this interesting plant might appear to 
differ generically from the original O. Roraime, Benth., from 
Guyana, a more close inspection shows those differences to be 
merely specific. The leaves, which have in both the same firm 
texture and glossy surface, are here scattered on the branchlets, - 
instead of being collected rather densely towards their apex; 
the inflorescence consists of racemose fascicles, not of a sub- 
corymbose panicle; the petals become thicker, and might be 
called almost woody, a character which, connected with all 
others, marks out the affinity of both- plants with the genus 
Ivionanthus of Jack. — (Planchon.) 
Prate XXIII. Fig. 1. flower, long after fecundation ; f. 2. 
petal, with two stamens ; f. 3. pistil, with the dise and lower 
parts of the filaments; f. 4. vertical section of the same; 
f. 5. fruit in the persistent flower ; f. 6. transverse section of 
the same ; f. 7. seed, with the arilliform production of the 
exostome. 
XXV. ERYTHROXYLEX. 
1, Erythroxylon, possibly Æ. ferrugineum, Cav.? — From Vogel's 
collection, without the precise station. The specimen is 
evidently of this genus, but quite undeterminable as to species. 
It does not appear to be the same as E. emarginatum, Schum. 
et Thonn. from Guinea, the only species as yet published 
from Western Africa. 
XXVI. HyPERICINEX. 
L Psorospermum ferrugineum, Hook. fil. ; caule tereti erecto, 
foliis brevissime petiolatis elliptico-obovatis oblongisve obtusis 
V. acutis adultis glabratis subter reticulatis immaturisque 
utrinque ferrugineo-tomentosis, marginibus leviter revolutis. 
pedunculis axillaribus sub-3-chotomis pedicellisque rufo- 
tomentosis, sepalis obtusis pubescentibus fasciculos staminum 
Pentandros zquantibus, petalis intus subvillosis. — Sierra 
Leone, Don. 
R 
