47 



6 obliqua? Ait. 



7 ochroleuca Schwein. Weak Stem Violet. 



8 ovata Nutt. 



9 palmata L. Hand Violet. 



10 pedata L. Bird Foot Violet. 



11 pubescens Ait. Yellow Violet. 



12 rostrata Muhl. Beaked Violet. Conway. 



13 rotundifolia Mx. Ground Violet. 



14 sagittata Ait. Arrow Violet. 



<5i 15 tricolor L. Garden Violet. 



* i - . i 



1-6 villosa Nutt. 



423 Vitis L. 



1 aestivalis Mx. Summer Grape. 



2 cordifolia Mx. Frost Grape. 



3 labrusca L. Plum Grape. 



X. 



424 Xanthium L. / 



1 strumarium L. Clott Burr. 



425 Xylosteum Tournef. 



1 ciliatum Ph. Fly Honey Suckle. 



2 villosum Mx. solonis Eaton. Deerfield. 



426 Xjris L. 



1 caroliniana Walt. Yellow Eyed Grass. Shutesbury. 



427 Zanthoxylum L. 



1 fraxineum W. Prickly Ash. Sunderland. 



428 Zizania L. 



1 clavulosa Mx. Water Oats. Wild Rice. Northampton 

 Meadows. 



429 Zostera L. 



1 marina Vahl. Grass Wrack. Sea Eel Grass. N. Haven. 



