. Potamogeton. TETRANDRIA TETRAGYNIA, ‘ 453 
sessile, linear, much waved, entire, clear, when dry membra- 
naceous, - > Pat 
Found immersed in extensive masses, in ponds, ie and 
receptacles of fresh water in Bengal, during the dry season, 
chiefly when im flower in February, it rises so near tothe sur- 
face as to allow the little spikes of flowers to gereickc com- 
pletely, ; 
Root of long simple fibres, brown, &c. siénotvliag to the 
colour of the mud they enter ; on the creeping joints are ge- 
nerally found small conndahdobae, viviparous tubers, Stems 
and branches of various lengths, according to the depth of the | 
water, &c. a groove'on each side gives them the appearance : 
of being compressed, thick as a pack-thread, smooth, at the 
bottom of the water creeping, towards the extremities when 
in flower dichotomous ; previously to that period the branches 
are alternate and naillay. Leaves sessile, alternate, except 
at the floriferous fork of the branches, where they are oppo- 
- site, linear, rather obtuse, much waved, finely and acutely 
serrulate, with two slender nerves near the margin,*pellucid, 
from two to three inches long, by little more than a quarter 
of an inch'broad, Stipules sheathing, short, smooth, greenish 
like the other parts of the plant, and scarcely to be distin- 
guished from them: Spikes solitary in the fork of the 
branches, rather long-peduncled, from four to eight-flowered, 
when in blossom emerged, afterwards immerged. Corol, 
stamina, and germ as in the genus, but here there certainly is 
a style with four large, obliquely truncated mene Seed as 
miei natans, Gert, sem, li, 23. tab. 84, iets 
Ce3 
