Lemna. .MONOECIA DIANDRIA. 565 
3. C. involucrata, Roxb. : 
Stems and branches filiform, smooth. Leaves verticelfed, 
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 ofa 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 immediately under them. Flowers on 
the joints of the leaves. Calyx &c. of both male and female, 
as in the last described. 
MONOECIA DIANDRIA. 
LEMNA. Schreb. gen. N. 1430. 
Male calyx one-leaved. Corol none. Female calyx one- 
leayed. Corol none. Style one. Capsule dne-celled, two- 
seeded. 
1. L. orbicudata. 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 
Bengal. — 
2. L. globosa, R. : 
Single, globular, rootless, ities one, or at most two toge- 
ther, singly about the size of a grain of sand. , 
With L. orbiculata, found in very great abundance on 
tanks and pools of stagnant water in Bengal — com-_ 
pact green scum, over the surface. 
