MALACEAE 38 1 



11. R. Lyoni Pursh (R. hitmilis villosa Best.)- Central N. Y. and 



N. J. to Ark. and Kan. 



N. Y. Rare and local on L. I. and S. I., increasing northward. 

 N. J. Hunterdon, Warren, Morris, Passaic and Sussex counties. 

 Pa. Bucks and Northampton counties. 



12. R. Carolina L. {R. humilis Marsh.). Me. to Ga., Kan. and 



Wise. 



Throughout the range, except in the pine-barrens, there rare or 

 wanting. 

 Hybridizes with R. virginiana and palustris 



13. R. serrulata Raf. Mass. and Ont. to Iowa, south to Fla. and 



Tex. 



Throughout the range, except in the pine-barrens, there wanting; 

 scattered and local in its distribution. 



14. R. spinosissima L. (R. cinnamomea L.). Escaped from 



gardens: E. U. S. Native of Europe and Asia. 



A rare escape from gardens in the northern part of the area; 

 perhaps not persisting. 



15. R. rugosa Thunb. Escaping from gardens. Native of E. 



Asia. 



Established as an escape in Conn, and L. I. 



16. R. Solanderi Tratt. (R. blanda Lindl. not Ait.). Anticosti 



to Conn., Pa., 111., N. Dak. and Man. 



Known definitely only from Litchfield Co., Conn, and Bucks and 

 Delaware counties, Pa.; perhaps not as a wild plant in the area. 

 Reported from Hunterdon and Sussex counties, N. J. 



17. R. pimpinellifolia L. As an escape: E. U. S. Native of Eu. 



and Asia. 



A rare escape from cultivation in some parts of our range; hardly 

 persisting. 



Among the numerous waifs and adventives perhaps the most persistent is Kerria 

 japonica (Thunb.) DC. which is widely cultivated and often escapes. 



MALACEAE 



Ripe carpels papery or leathery. 



Leaves pinnate. 1. Sorbus 



Leaves simple, entire, toothed or lobed. 



Cavities of the ovary as many as the styles. 



Flesh of the pome with grit cells. 2. Pyrus 



