122 
CONTRIBUTIONS TO BOTANY. 
long, 14 " 1 | broad, with a rather acute basal sinus 2 lines 
deep, the petiole being only ^ inch long. The panicles, which 
are very numerous in each axil, are about If incli long, widely 
spread upon a peduncle 4 lines long, which branches repeatedly 
at short intervals, its form being quite lost in the complexity of 
of the whole infloi’escence. 
4. Pericampylus membranaceus, nob. ; — Cocculus membranaceus, 
Wall. Cat. ; — ramulis scandentibus, teretibus, teneribus ; foliis 
obsolete peltatis, deltoideo-ovatis, imo rotundis vel subsinuatis, 
apice rotundiusculis, longe mucronatis, valde membranaceis, 
5-nerviis, cum nervulis 2 alteris basalibus mox in marginem 
continuis, utrinque fere glabris, in nervis solumrnodo parce 
puberulis, margine ciliatis ; petiolo tenuissimo, striolato, re- 
trorsum puberulo, limbo dimidio breviore. — In Malacca, v. s. 
in herb. Soc. Linn., Pulo-Penang (Wall. Cat. 4967). 
Many specimens of this plant have been distributed from the 
Wallichian collection ; but in no instance has the trace of in- 
florescence been detected, probably owing to the time of year 
when the plants were collected. The authors of the ‘ Flora 
Indica ’ consider it to be a diseased state of their Cissampelos 
Pai-eira {C. cpnvolvulacea, DC.) ; but here, I think, they are 
under misconception, because its leaves have the peculiar nerva- 
tion of Pericampylus, in which genus the nerves and their ex- 
ternal branches do not anastomose as in Cissampelos, but are 
directed towards the edge of the leaf in a straight line, there 
uniting with a distinct marginal nerve, and each generally ter- 
minating in the sinus of a crenature. It might be regarded as 
Pericampylus incanus in a sickly condition ; but the shape of its 
leaves hardly supports this supposition : it will most probably 
turn out to be a distinct species. The branches are extremely 
slender, with very crowded foliage, the smaller leaves being 
almost palate, and seldom more than ^ to f inch in diameter ; 
the larger leaves are few, 2 inches long, 2 inches broad, on a 
very slender petiole 1 inch long, inserted half a line within the 
margin. 
22. PSELIUM. 
In 1851 I formed the character of this genus from the ex- 
amination of Loureiro’s typical specimen in the British Museum, 
which has only male flowers. That botanist, however, was wrong 
in his generic details, as it is evident that the plant from which 
he derived the character of the female flower and seed must have 
been a Stephania : in his description of the male flower, he is 
incorrect in stating that its six petals are twice the length of 
