A CENSUS OF THE INDIAN POLYGONUMS 
419 
bracts, as is seen in Polygonum alatum. Two plants at least, Polygo- 
num Hooker i and Polygonum plehejum var. effusdy have had to be 
entered twice, as the former may be picked up with a spicate or with a 
paniculate inflorescence, and the latter with short leaves or long and 
slender leaves. ■ 
I. — Twining Plants. 
* Fruit not Winged . . . . . P. Convolvulus. 
** Fruit winged 
Wings very little if at all prolonged down 
the pedicel . . . . . P. dumetorum. 
Wings prolonged down to the base of the 
pedicel , , . . , . P. pterocarpum. 
II. — Non-twining Plants. 
A. Inflorescence axillary. 
* Leaf lamina, elliptic, ovate or orbicular, length 
not more than four times the breadth, 
usually much less 
t Stipules with two distinct excurrent 
nerves 
The excurrent nerves spinescent and 
leaves mucronulate . . 
The excurrent nerves not spinescent 
and leaves not mucronulate , 
tt Stipules without excurrent nerves 
§ Leaves. hirsute . • • . 
§§ Leaves glabrous 
X Plants tufted delicate annuals 
with very minute flowers, 
bipartite stipules and non- 
tubular bracts 
Leaves opposite 
Leaves alternate 
X X Plants not tufted but prostrate 
or ascending with fair-sized 
flowers,- with tubular bracts 
and tubular stipules, which 
latter may be slightly or 
much lacerate 
P. biaristatum. 
P. recumbens. 
P. filicaule. 
P. islandicum. 
P. delicatulun^: 
