Potamoaeton. tetrandria tetragynm. 451 



1 . M. letrandrum. R. 



Leave* verticelled. all riliform-pinn atind. F Hil- 



ary, verticelled. tetrandrou-. Calyx four-leared. 



Compare with Huttonia sesdliflora. L I Willi. 



i. sia 



Tetimg. Neerla-pamarom. 



It grows m sweet water: appearing: doling the rains. 



Stems round, articulate, spongy below the water, length 

 various above the water from four to six inches, about the 

 thickness of a crow's quill. Leave < verticelled. piunatirid, 

 below the water they are much larger, ^ith capillary - _- 

 uients: above the water they are small. Flower* very small, 

 white, verticelled. i. e. one in the axill of each le it. C 

 above, four-leaved ; / -four, obi _. 



Filaments shorter than the pel a. 



2. M. tuberculatum. /?. 



Leaves verticelled. pinuatitid. Flower* axillary, vert* 

 ed. tt-trandrous : fruit tetraceoas, tubereb-d. 



A native of borders of 1 k s, ad other moisl p) 



Calcutta, in bios - ery much 



like M. tetrandram. 



Stems creeping, round, jointed, length various, the i 

 extremities aboat five of -i\ mches. leaves rertieelled, pin- 

 uatitid. or acutely senate. F rertlcefled, sessile, one 

 in the axill of each leaf, small, pink-coloured. 

 Carol; petals oblong, expanding, pink-coloured. Fi/ameat- 

 short. Anther* linear. Seed* united in tbe form of a four- 

 lobed. tubercle d pericarp. 



POTAMOGETON. Schreb. gem. N. 234 



Calyx none, Carol four-petalled. Germs four. & 

 none. Seed* four. Embryo hooked, without perisperm. 



G :2 



