CHECKLIST OF NORTH AMERICAN PLANTS. 147 



MARSILIACEiE. — pilularia 



MARSILIA 12791 Americana, A. Br 



-i-2786 macropoda, Engelm. ^ , ^ ,,,,,^ 



-i2787 quadrifolia, L. . _^, ^ALVLNIACEJ]. 



12788 uncinata, A. Br. ^oTch n. ,• • 



-^2789 vestita, Hook. & Grev. ^.l^t Carolmiana, Wdld. 



12790 var.teauifolia,Undervv. SALV.Nir ''' '^'"'• 



& Cook. 12794 natans, L. 





Number of Orders represented ' ]68 



" Genera ! J^'l^^^^' • •%1'??4 [ 



( Introduced 139 ) ^'^^^ 



" Species j ^ative. . . 10,136 ( ^ . 



( Introduced 570 i ^^''^ 



