6o ROCHESTER ACADEMY OF SCIENCE. [Oct. 8, 



ROSACEA. 



no. P/^UJ^US Tourn. [L.] 



250. P. Persica L. [Amygdahis Pcrsica L.] Peach. 



Roadsides and waste places ; occasional. 



251. P. Americana Marshall. Wild Plum. 



River banks, thickets, and borders of woods ; frequent. 



252. P. DOMESTiCA L. Garden Plum. Escaped ; frequent. 



253. P. Avium L. English Cherry. 



Occasionally escapes to thickets and woods. 



254. P. Cerasus L. Sour Cherry. Roadsides ; infrequent. 



255. P. putnila L. Dwarf Cherry. 



Rare. Penfield, Dr. C. M. Booth. 



256. P. Pennsylvanica L. f. Wild Red Cherry. 



Ravines and along the banks of the Genesee ; frequent. 



257. P. Virginiana L. Choke-cherry. 



Rocky banks of Genesee river, ravines, thickets ; common. 

 258 P. serotina Ehrh. Wild Black Cherry. 

 Woods ; widely distributed, but scarce. 



III. SPIR.EA L. 



25Q. S. salicifolia L. Common Meadow-sweet. 



Borders of marshes ; not common. Brighton, Miss Mary E. Macatiley. 

 Mendon ponds, George T. Fish.' Long pond. Dr. Searing. Hamlin, 

 iM. S. Baxter. Wayne county. 



260. S. tomentosa L. Hardhack. 



Norton and St. Joseph streets, L. Holzcr. Probably introduced. 

 T12. PHYSOCARPUS Maxim. [Opui.astek Medic] 



261. P. OPULiFOLius Maxim. {Spi?'cea opulifo/ia L.) \Opulastcr opulifolius (L.) 



Kuntze.] Nine-bark. Known only as an escape. 



113. RUBUS Tourn. [L.] 



262. R. odoratus L. Purple Flowering Raspberry. 



River banks and ravines ; common. 



263. R. triflorus Richardson. [Ti. Ainericanus (Pers.) Britton.] Dwarf 



Raspberry. 



Dry or moist woods ; frequent. 



264. R. strigosus Michx. Wild Red Rasi-bickry. 



Borders of woods and fields ; abundant on clearings. 



265. R occidentalis L. Black Raspberry. 



Thickets, waysides, fences ; common. 



266. R. villosus Ait. Common High Blackberry. 



Rocky river banks, borders of woods, thickets, clearings ; common. 



267. R. Canadensis L. Dewberry. 



River banks, borders of woods, copses, fields ; frequent. 



