FLORA NIGRITIANA. 279 
scale opposed to it; this scale is however represented too 
narrow at the base, and too evidently connected with the 
petal; f. 3. anther, back view : all magnified. 
The Rhamnus paniculatus, Schum. et Thonn. ; which De Can- 
dolle had, without examination, referred doubtfully to Ceanothus, 
under the name of C.? Guineensis, (Prod. 2. p. 30), is evidently, 
from Thonning’s detailed description since published, a Chail- 
letia nearly allied to C. toxicaria, and if really a distinct species, 
should receive the name of C. paniculata. A seventh species, as 
yet unpublished, is among Heudelot’s Senegambian plants, which 
gives to Tropical Africa nearly half the total number of species 
now known of this small Order, whose affinities with Hippo- 
crateacee and Celastrinee become more and more evident as 
the species are better known. ‘The valvate calyx, mentioned 
among the distinctive characters by Lindley (Veg. Kingd. 
p. 583), is a mistake; all the species known to me have it 
imbricated in æstivation, as originally described by De Candolle ; 
so much so, that one division of the calyx is usually entirely 
concealed by the others in the bud. The characteristic disc of 
Celastrinee, which in Hippocrateacee is united with the fila- 
ments in a fleshy mass, is represented among Chailletiacee by 
the hypogynons glands, which are sometimes slightly connected, 
s0 as to form a real disc, only differing from that of several 
Celastrinee by being more deeply lobed. The three groups 
might indeed be considered, without inconvenience, as three 
tribes of one natural Order.—(G. B.) 
XLII. HirrocRATEACE X. 
l. Hippocratea rotundifolia, Hook. fil. ; caule tereti seandente? 
cortice levi, foliis petiolatis late oblongis rotundatisve obtusis 
V. subacuminatis rugosis utrinque reticulatis coriaceis, pani- 
culis axillaribus terminalibusque dichotomis ramis erectis 
elongatis, petalis rotundatis concavis, disco depresso concavo, 
antheris 4-lobatis extrorsum dehiscentibus.—Sierra Leone, 
Don. 
Rami cortice griseo-fusco levi tecti. Folia opposita, 4-5 unc. 
