49 



Potentilla arguta, Pursh. 

 LynnfJeld Hotel Station (Mrs. Horner); Salem Pastures (S. B. 

 Buttrlck) ; Gloucester (Mrs. Babson) ; Andover (Mrs. Downs). 

 Not very common. 



Potentilla Anaerina, L. (Silvbu-Weed.) 

 Salt marshes. Common. 



Potentilla frutioosa, L. (Shrubby Cinqub-foil.) 



" Serpentine quarry, Lynnfleld " (Tracy) ; Eockport (Frank Luflcin') ; 

 "Turkey hill" and "Pine swamp," Ipswich. The stems of this 

 species are sometimes more than half an inch in diameter. Al- 

 though abundant in the above locajities, this may be considered 

 as scarce in the county. This plant is a great pest in portions of 

 ■western Massachusetts. 



Potentilla tridentata, Ait. 

 Gloucester (Mrs. Babson) ; Rockport (Frank Lufkin). Scarce. 



Potentilla palustris, Scop. (Marsh Five-Finger.) 

 "Danvers" (Dr. Osgood's list); Wenham (Dr. Chas. Pickering). 

 Not in the county collection at the P. A. S. Scarce. 



Pragaria Virginiana, Ehrhart. (Common Strawberry.) 

 Damp ground or hillsides. Common. 



Fragaria vesca, L. (Long-fruited Strawberry.) 

 Although this has been reported from several places, the only 

 specimens seen were collected at Boxford. Scarce. 



Eubus Dalibarda, L. (Dalibarda repens, L. Gray's Manual.) 

 Manchester woods (Mrs. Babson and others). 



Rubus odoratus, L. (Purple Flowering-Raspbber-x.) 

 Amesbury (J. G. Whittier) ; Andover (Mrs. Downs), etc. Common 

 in rocky places. Higginson speaks of this plant as growing near 

 Salem in 1629, and the locality where it now flourishes in Salem 

 Great Pastures was coTasidered by Dr. Chas. Pickering to be the 

 same one known to Higginson. Frequent in cultivation in the last 

 century as noted by Cutler in 1783. 



Rubus triflorus, Eichardson. (Dwarf Raspberry.) 

 "Essex County" (memo. Dr. Chas. Pickering) ; "Danvers" (Bige- 

 low's Fl. Bost. 2nd. ed. 1824) 1877 (J. H. Sears). Growing in moist 

 places rather than dry hills as spoken of by some writers. Scarce. 



Rubus strigosus, Michx. (Wild Red Raspberry.) 

 Common by roadsides and in rocky places. 



Rubus occidentalis, L. (Thimblebbrry.) 

 Frequent in most towns of the county. • 



Rubus Canadensis, i. (Low Blackberry ; Dewberry.) 

 Fields and borders of woods. Common. 

 i 



