37 



323 Rhexia L. 



1 Virgioica . Meadow Beauty. Deer Grass. Shutesbury 

 Pond. 



324 Rhodora L. 



1 canadensis L. Fake Honeysuckle. Amherst and Hardwick. 



325 Rhododendron L. 



1 maximum L. American Rose Bay. Medfield and Dedham. 



A magnificent flowering shrub. 



326 RhusL. 



J aromaticum Ait. Williamstown. 



2 copallinum L. Sumach. 



3 glabrum L. Sumach. 



4 toxicodendron L. Poison Ivy. Poison Ash. 



5 typhinum L. Sumach. 



6 vernix L. Poison Sumach. 



327 Rhjnchospora Vahl. False Bog Rush. 



1 alba Vahl. 



2 glomerata Vahl. 



3 marcrostachya Torrey. MS. Belchertown and Leverett. 



328 Ribes L. 



1 gracile Mx. West River Mountain. 



2 floridum l'Herit. Black Currant. 



3 lacustre Ph. 



4 prostratum l'Herit. Chesterfield, N. H. 



5 rigens Mx. Monadnock and White Hills. 



6 trifiorum W. Wild Gooseberry. 



329 Robinia L. 



§ 1 pseudo-acacia L. Locust Tree. 



330 RosaL. 



1 corymbosa Ehrhart. Carolina L. Swamp Rose. 



2 lucida Ehrh. Williamstown. 



3 parviflora Ehrh. Carolina Mx. Wild Rose, 



4 rubiginosa L. Sweet Briar. 



331 Rubus L. 



1 canadensis L. 



2 obovalis L. 



3 occidentalis L. Black Raspberry. 



5 



