25 



ROSA, Tourn. 



R. Carolina, L. SWAMP ROSE. 



R. iucida, Ehrh. DWARF WILD-ROSE. 



CRAT^GUS, L. 



C. tomentosa, L., var. punctata, Gray. BLACK THORN. 



C. Crus-galli, L. COCKSPUR THORN. 



A hedge enclosing a tract of land west of the town, set out 

 by William Henry Gardner about 1830, to shield young mul- 

 berry trees ; Mr. Gardner also planted another hedge in a 

 lot across the Creeks. Although the shrub is a native of 

 America no wild plant has yet been reported on the island. 



PlRUS, L. 



P. arbutifolia, L. CHOKE-BERRY. 



AMELANCHIER, Medic. 

 A. Canadensis, Torr. & Gray. SHAD-BUSH. SERVICE-BERRY. 



SAXIFRAGACE^E. 



RlBES, L. 



R. hirtellum, Michx. GOOSEBERRY. 

 Rather common in thickets. 



CRASSULACE^:. 



TlLL^A, L. 



T. simplex, Nutt. 



" On the dried borders of small ponds at Nan tucket." Oakes. 

 1829, Hovey's Magazine of Horticulture and Botany. Vol. 

 VII. Not reported since. 



SEDUM, Tourn. 



S. acre, L. MOSSY STONE-CROP. 

 Sparingly escaped. L. L. D. 



