32 MIDDLESEX FLOEA. 



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

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

 was introduced from tlie "White Mts. by Minot Pratt. June. 



P. palustris, Scop. Maesh Five-Fingbk. 

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

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

 Not very common. June-July. 



P. recta, Willd. 

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

 in this 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. 



Feagakia, Tourn. Steawbeket. 



F. Virginiana, Duchesne. 



Common. May. 

 F. vesca, L. 



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



of the county. May-June. 



Dalibaeda, L. 



D. repens, L. (Eubus Dalibarda, L.'i 

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

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



Eubus, Tourn. 



R. odoratus, L. Pueple Floweeing Easpbbeey. 



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



(A.E.Scott). Kot common. June- July. 

 R. triflorus, Eich. Dwaef Raspbebet. 



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

 R. strigosus, Michx. Eed Easpbeeey. 



Common. Occasionally found with variegated leaves. June. 

 R. occidentalis, L. Black Raspbeeey. Thimblebeeey. 



Eather common. June. 

 R. villosus, Ait. High Blackbeeey. 



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



fusus occasional. May-July. 

 R. Canadensis, L. Low Blackbeeey. Dewbeeky. 



Common. May-June. 

 R. hispidus, L. Running Swamp Blackbeeey. 



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



common. 



