32 MIDDLESEX FLOKA. 



P. tridentata, Soland. THREE-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 Stoueham (F. S. Collins) ; 

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

 Not very common. June- July. 



P. recta, Willd. 



Found for several seasons in Maiden by F. 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. 



FRAGARIA, Tourn. STRAWBERRY. 



F. Virginiana, Duchesne. 



Common. May. 

 F. vesca, L. 



Common in the north-western, but infrequent in the eastern section s 

 of the county. May-June. 



DALIBARDA, L. 



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



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

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



RUBUS, Tourn. 



R. odoratus, L. PURPLE FLOWERING RASPBERRY. 



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



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

 R. triflorus, Rich. DWARF RASPBERRY. 



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

 R. strigosus, Michx. RED RASPBERRY. 



Common. Occasionally found with variegated leaves. June. 

 R. occidentalis, L. BLACK RASPBERRY. THIMBLEBERRY. 



Rather 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. RUNNING SWAMP BLACKBERRY. 



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



common. 



