COLLECTED BY MR. SPRUCE IN BRAZIL. 415 
of the blade, while in C. ovalifolia it is scarcely more than one-twelfth 
or one-fifteenth of that length; the racemes (or rather young floriferous 
branchlets) are also much longer, and in axillary pairs (not single) ; 
the bracts or young leaflets are more membranaceous (while in the 
other they are thick and opake), with six or seven (instead of four) 
flowers in each axillary fascicle. 
3. Cissampelos denudata, Miers, n. sp.; volubilis, caulibus striatis 
tuberculatis junioribus retrorsum ferrugineo-pubescentibus delapsu 
foliorum cito nudis et ex axillis hine deinde floriferis, foliis (marium) 
orbiculato-cordatis obtuse acuminatis mucronatis membranaceis 
subtus cinereo-glaucis utrinque parce pubescentibus 7-—9-nerviis 
petiolo gracillimo griseo-pubescente æquilongis, racemis masc. binis 
longissimis gracilibus paniculatis bracteisque minutis linearibus 
caducissimis pubescentibus, fæm. 2-4 simplicibus crassioribus multo 
brevioribus, pedicellis 5-6 fasciculatis 1-floris, fasciculis bractea 
unica minuta lineari donatis, baccis glabris ? 
Found by Mr. Spruce near Obidos, and on the lake Quiriquiry, near 
the river Trombétas : it is evidently a long straggling climber, known 
to the natives by the Caribbean name of Ambôa Rembd. The leaves (at 
least in the male plant) are broadly heart-shaped, tapering obtusely to 
the summit, where it is terminated by a pubescent mucronate point ; 
they are 21 inches long, or 24 inches from the insertion of the petiole, 
and 21 inches broad ; the petiole of marginal insertion is slender, re- 
flexed at its origin, fulvo-pubescent, and 14 inch long. The male ra- 
cemes are very slender, 6-8 inches long, pubescent, and throw out at 
intervals of every 4 or 4 inch, three fasciculate pedicels 1 to } inch in 
length, which are again dichotomously divided, bearing numerous mi- 
nute florets ; at each branchlet there is a very minute linear tomentose _ 
bract, so that the inflorescence appears almost ebracteate : the ay 4 
pedicels are smooth, the flowers quite glabrous, the sepals s 
linear and obtuse, the corolla deeply bell-shaped, with an DEI. 
4-lobed margin, and the annular anther is 4-celled. About three ra- 
cemes grow out of the bare axils of the female plant, each having a — 
much stouter peduncle, about 2 inches long, producing, at intervals of 
one-eighth of an inch, about five or six fasciculate pedicels, each bear- | 
ing a solitary minute flower: at the base of each fascicle is a minute — 
and very caducous bract, so that the female racemes are apparently 
ebraeteate: the sepal and petal are both glabrous, the former obovate, _ 
