A CENSUS OF THE INDIAN POLYOONUMSv 
435 
OO Bracts and perianth eglan« - - 
dular, c ' 
, . A Bracts more or less . 
hairy . ' . . P. stagninum. 
A A Bracts quite glabrous 
' ‘ Leaf-bases acute or 
acuminate . P. barbatum. 
Leaf-bases obtuse or 
slightly cordate , P, serrulatuna. .. 
tt Racemes slender, loose. Bracts more 
or less interrupted 
. § Perianth glandular 
Raceme long-interrupted. Stipu- 
lar cilia at least half as long as > 
the tube or longer. Leaves 
glabrous or very sparingly hairy P. flaccidum. 
Leaves hispidly hairy at least, 
beneath • . • « P. flaccidum 
VAR.‘ hispida. 
Raceme short-i nterrupted. 
Stipular cilia quite short or 
absent . # . P. Hydropiper. 
Whole plant minutely glandular P. Hydppiper 
VAR. glandulosis- 
§§ Perianth eglandular sima. 
X Stipules and bracts entire or 
only slightly fimbriate; 
never ciliate 
Leaves sagittate or hastate. 
Racemes flaccid . . P, birmanicum. 
Leaves elliptic-lanceolate. 
Racemes rather strict . P. Bellardi, 
X X Stipules and bracts ciliate, 
O Nut bi-con vex. 
Styles hooked • • P. \irginianum. 
Styles not hooked * . P, assamicum. 
, O O Nut trigonous. 
Nut sharply trigonous, 
' ' ^ perfectly smooth and 
polished , . P. Posumbu. 
Nut obtusely trigonous, 
finely puncticulate • P, mite. 
