152 
1320. S. apus, Spring. 
Shaded banks and sandy banks of sloughs : rare. August. (B.) 
Evanston. Pine Station, Miller’s, 1889, and Clarke, Ind. Windsor 
Park. Colebour, Ind., Hill. 
ISOETES, L. 
1321. I. melanopoda, J. Gray. Quillwort. 
Muddy borders of a pond near Hyde Park water works, 1885. Wet 
prairies near Grand Crossing, 1886-87. (B.) 
SAL VINTAGE J?E. 
AZOLLA, Lam. 
1322. A. caroliniana, Willd. Azolla. 
In a pond near South Chicago, 1886. 
During improvements made in this locality, the pond was filled. 
So far as known, this is the only locality where this species has 
been found within our limits. (B.) 
