9 Leaves sometimes pinnate or forked, usually entire 
/Z, and simple 
jo Leaves pinnate or forked, the segments linear or 
/4 hairlike 
j2, Leaves bearing minute green bladder, 1 mm, or ‘ie ow 
ji, in diameter | Utricularia (p. _ 
A 
12 Leaves not as described 
/4 Leaves in whorls of 35-9 
ji, Leaves 2-3 times forked . Ceratophyllum p. a 
/> Leaves pinnatifid Myriophyllum (p: a 
i4 Leaves alternate Ranunculus ip end 
jc Leaves simple 
| Leaves oval, rotund, elliptical or sometimes sagittate 
Sagittaria (p. -\ 
/4 Leaves sagittate 
j4 Leaves not sagittate 
thin biintta dessin 
}i, Leaves peltate ‘ Brasenia ‘ca \i 
', Leaves not peltate | 
‘< Leaves entire at the base | 
? 9 Leaves longitudinally ribbed 
?‘2Plants of shallow water or muddy places Alisma ib-—) 
7/ Plants of 1-3 feet of water or more Potamogeton ip); 
- Leaves pinnately veined Polygonum {, ) 
¢ i 
|S Leaves deeply cut at the base 
2o Cut equal to half the length of the blade N sea ..-.) 
2 Cut equal to 1/3 the length of the blade 
’ 
ta 
or less Nymphozanthus . 
