i Pe T REOR eee oe 
FLORA NIGRITIANA. 257 
The genus Amyris had already been restricted to American 
plants by Kunth and others; Wight and Arnott showed that 
the Indian ones at least belonged to Aurantiacee, and chiefly 
to Claussena. Don, however, in establishing the genus Fa- 
garastrum for the African species, retained them among Tere- 
binthacew, without alluding to Aurantiacee. Presl has since 
perceived the affinity to the latter order of the South African 
species, but without comparing it either with Claussena or 
with Willdenow’s A. anisata, (from which it is separated by 
characters so slight as possibly not even to be specific), created a 
new genus under the name of Myaris. Both African species, 
C. anisata and C. inequalis, are very near in habit and cha- 
racter to the C. Willdenowii, but differ, not only in the form 
of the leaves and other minor points, but also in what at first 
might appear more important, that the ovules are usually, 
especially in C. inequalis, collateral and not superposed. It 
must be observed, however, that even in the Indian species the 
ovules are collaterally inserted, although from the form of the 
cell they place themselves one above the other as they are 
developped, the placenta becoming slightly elongated into an 
umbilical cord. In C. anisata and inequalis, the number, form 
and size of the cells is variable ; they are usually small, and 
according to that form, the ovules at the time of flowering lie 
either more or less superposed, or absolutely side by side, 
especially in C. inequalis. 
l. Citrus aurantium, Linn.—C. articulata, Willd. in Spreng. Syst. 
3. p. 334 ?—Cape Palmas and Isle of S. Antonio, Vogel, (pro- 
bably cultivated.) 
The only other W. African Aurantiacea published is Citrus 
Paniculata, Schum. and Thonn., from Guinea, which, however, 
Put the character given, can scarcely be a true Citrus.— 
. B.) 
XXXI. OraciNzEx. 
l. Heisteria parvifolia, Sm. in Rees’ Cycl. v. 17; ramulis an- 
gulatis, foliis ovatis oblongisve acuminatis coriaceis, calycis 
fruetiferi profunde lobati lobis subcordato-ovatis acutiusculis 
s 
