642 Plants of ihe Punjab. 
ne 
WATER PLANTS. 
Herss LEAFLESs. 
PETALS NONE. 
Lemna gibba, . like the last species, but frond larger, 4-4 im. diam. 
Gibbon’s Duckweed, circular, flat above, convex below, ovules 2-7. 
LEMNACES. 
P58. A; vi.bo6, 
The Plains to 
7,000 ft., in stagnant 
water. 
Lemna trisulea, like the last species, but frond larger, 4-2 in., lanceolate 
LEMNACES. ~* with a broad toothed tip, not convex below, ovule one. 
gp linle te Guay epitay ee i 
The Plains, in 
stagnant water. 
Lemna polyrrhiza, like the last species, but root fibres several, clustered, 
Great Duckweed, frond 4-4 im. diam., broadly ovate or circular, both surfaces 
LEMNACES. nearly flat, dark green above, usually purple below, ovules 
PBL wind: 1 on 2: 
The Plains to 
5,000 ft., 
in stagnant water. 
Wolffia arrhiza, minute, like grains of green sand, root fibres none, 
Rootless Duckweed, frond 4, in. and less in diam., upper surafce flat, lower 
LEMNACER. swollen, flowers consisting of one sessile anther and one 
HBr Lyi bb: ovule bursting through the upper surface of the frond. 
The Plains to 
10,000 ft., 
in stagnant water. 
