FAMILY VII, SALVINIACE/E. 
5 MALL, fugacious, floating annuals, much branched; branch- 
es covered with minute leaves, and sending out roots be- 
neath. Sporcarps at the base of the branch, two or several 
together, of two kinds, one containing a single macrospore, and 
the other many microsporangia containing microspores. Contains 
two genera, one of which is represented in our limits. 
AZOLLA Lam. 
228. A. Caroliniana Willd. Plant reddish, much branched, 
deltoid, J-l inch broad ; macrospore with three float corpuscles, 
its cuticle granulated ; masses of microspores beset with bristles. 
Floating on the surface of the pond in the park at Springfield, 
Mass., and thence escaped into the Connecticut river. Adventive 
from California. August. 
Illustrated with dissections in Gray’s Manual. 
