CONTRIBUTIONS TO BOTANY. 
159 
lato-oblongo, extus piloso ; petalo dimidio breviore, late reni- 
fortni, breviter unguiculato, glabro; ovario piloso; stylo crasso, 
longiusculo ; stigmate 3-lobo. — In prov. Argentinis ; v. s. in 
herb. Hook. (Jet $ , Entre Rios (Tweedie). 
This is a species very I’emai'kable for its deep basal sinus, 
which extends to more than a third of the length of the leaf. 
Its internodes are 1^-3 inches long; the leaves are 2-3 inches 
long, 2-2| inches broad, with a basal sinus generally not more 
than 3 lines wide and 10 lines deep, the petiole (1^-1| inch 
long) being inserted ^ line within the margin of the narrow, 
rounded basal sinus. The (J panicle is 1 inch long, the thread- 
like peduncle being 6 lines long ; the raceme-like floriferous 
branch is 1^ inch long, its axils 3-4 lines apart; the lower bracts 
1 line in diam., the upper setaceous bracteoles line long ; 
each panicle is dichotomously divided, with a solitary pedicel in 
each sinus, the ultimate rays being spicated. The ? raceme is 
2-3^ inches long, the reniform bracts, 3-4 lines apart, 4 lines 
long, 5 lines broad, becoming shorter upwards ; the pedicels 
are ^ line, the ovary ^ line, the sepal | line, the petal ^ line 
long. 
30. Cissampelos hederacea, noh. ; — ramulis tenerrimis, striatis, 
subglabris ; folds supeltatis, parvis, deltoideo-cordiformibus, 
imo sinu latissimo profunde cordatis, lobis basalibus rotun- 
datis, apice obtusiusculis et emarginatis, 5-7-nerviis, supra 
sub lente brevissime puberulis, subtus pallidioribus et fulvo- 
glaucis, subpuberulis ; petiolo tenui, limbo dimidio breviore, 
pubeseente : paniculis (J binis, axillaribus, petiolo triplo vel 
dimidio brevioribus, pubescentibus, alternatim brevissime 
ramosis, ramis divisis ramulisque bractea minima setacea do- 
natis ; sepalis 4, ovatis, margine crenulatis, extus pilosis ; 
petalo depresso, cyathiformi, integro, glabro ; anthera 4-loba. 
— In prov. Argentinis : v. s. in hei'b. Hook. ^ , forsan ex Entre 
Rios (Tweedie). 
A species of ivy-like growth, remarkable for its small, tri- 
angular, deeply cordate leaves : it much resembles the African 
Cissampelos tamnifolia, from Delagoa Bay, from which it differs 
in its more pubescent, larger, and less acute leaves, and in its 
very dissimilar inflorescence. The axils are about 1^ inch apart; 
the leaves are Ij-l^ inch long, l^-lf inch broad, with a very 
wide hollow sinus 3-5 lines deep, on a slender petiole 6-9 lines 
long, inserted 1 line within the margin of the sinus ; the sides, 
from the middle towards the summit, are nearly straight ; they 
seem glabrous to the naked eye, but under a lens' are slightly 
puberulous. The (J panicles are 3 lines long, the peduncle being 
