Leinna. MONO ECU DIANDRrA. 565 



3. C. involiicrata. Roxb. 



Stems and branches filiform, smooth. Leaves verticelled, 

 undivided, three or four-jointed, with a male and female 

 flower on each joint. 



Beng. Jhanj. 



Found in tanks and pools of water near Calcutta during 

 the cold and hot seasons. 



Stems and branches numerous, and several feet in length, 

 floating in the water, jointed, filiform, smooth and of a soft tex- 

 ture. Leaves verticelled, smooth, and generally compound, 

 of three or four joints with the leaves two-pointed. Bractes 

 or involucre, a whorl of short, pointed bodies, alternate with 

 the leaves, and placed inunediately under them. Flowers on 

 the joints of the leaves. Calyx &c. of both male and female, 

 as in the last described. 



MONOECIA DIANDRIA. 



LEMNA. Schreh. gen. N. 1430. 

 Ji'Iale calyx one-leaved. Carol none. Female calyx one- 

 leaved. Corol none. Style one. Capsule one-celled, two- 

 seeded. 



1. L. orhicutata. R. 



Leaves sub-sessile, orbicular, flat on both sides, from two 

 or three together. Roots fascicled, simple. 



Found most part of the year, floating on stagnant water in 

 Benoal. 



2. L. fflobosa. R. 



Single, globular, rootless, minute, one, or at most two toge- 

 ther, singly about the size of a grain of sand. 



With L. orbiculaia, found in very great abundance on 

 tanks and pools of stagnant water in Bengal forming a com- 

 pact green scum, over the surface. 



