32 MIDDLESEX FLORA. 



P. tridentata, Soland. Theee-toothed Cinque-foil. 

 Summit of Mt. Watatic, Ashby (L. L. Dame) . The Concord plant 

 was introduced from the White Mts. by Minot Pratt. June. 



P. palustris, Scop. Marsh Five-Finger. 

 Lowell (Dr. C. W. Swan) ; Maiden and Stoneham (F. S. Collins) ; 

 Cambridge (Geo. P. Huntington) ; So. Natick (Eev. Thos. Morong) . 

 Not very common. June-July. 



P. recta, Willd. 

 Found for several seasons in Maiden by F. S. Collins ; now extinct 

 in tills station; has grown for a dozen or more years in Concord, 

 near Monument street; scarcely established. Adv. from eastern 

 Eu. and Asia. For description, see Wood's Class-Book. 



Fragaria, Tourn. Strawberry. 



F. Virginiana, Duchesne. 



Common. May. 

 F. vesca, L. 



Common in the north-western, but infrequent in the eastern sections 



of the county. May-June. 



Dalibarda, L. 



D. repens, L. (Eubus Dalibarda, L.") 

 Ashby, near base of Mt. Watatic (L. L. Dame). The Concord 

 plant was introduced from Vermont by Minot Pratt. June-July. 



Eubus, Tourn. 



R. odoratus, L. Purple Flowering Easpberry. 



Lowell (Dr. C W. Swan) ; Concord (F. S. Collins) ; Lexington 



(A.E.Scott). Not common. June-July. 

 R. triflorus, Eich. Dwarf Easpberry. 



Widely spread, but not very common. May-June. 

 R. strigosus, Michx. Eed Easpberry. 



Common. Occasionally found with variegated leaves. June. 

 R. occidentalis, L. Black Easpberry. Thimbleberry. 



Eather common. June. 

 R. villosus, Ait. High Blackberry. 



Common. The forms known as var. frondosus and humi- 



fusus occasional. May-July. 

 R. Canadensis, L. Low Blackberry. Dewberry. 



Common. May-June. 

 R. hispidus, L. Eunning Swamp Blackberry. 



Common. June. The form known as var. setosus, Bigel., 



common. 



