CATALOGUE OF CANADIAN PLANTS. 427 



specimens were evidently persistent from the preceding year, although 

 not perennial. The seeds have one deep groove on the back, are pitted 

 all over and twice as large as those of E. Peplus. 



(1943.) E. hypericifolia, Linn. 

 Waterdown Road, near Hamilton, Ont. (Buchan.) 



533. MERCURIALIS, Linn. (DOG'S MERCURY.) 



(1944.) M. ANNUA, Linn. 



Abundant on waste or ballast heaps at Pictou, N.S., also more 

 sparingly at North Sydney, Cape Breton. (Macoun & Burgess.} 



534. ACALYPHA, Linn. (THREE-SEEDED MERCURY.) 



(1945.) A. Vlrginica, Linn. 



A. Caroliniana, Cat., Holmes Herb., 16. 



Abundant in river bottoms and in low damp cultivated fields. Com- 

 mon on low grounds at Montreal. (Holmes.) Abundant on low 

 grounds around Ottawa. (Fletcher Fl. Ott.) Ditches and low fields 

 at Prescott, Ont. (Billings.') Yery common on flats along the Nation 

 River at Casselman, Russell Co., Ont., and in fields and low boggy 

 grounds at Belleville, Ont. (Macoun.) Vicinity of Hamilton, Ont. 

 (Logie & Buchan.) Sandy shore, Hamilton, Ont. (Millman.) Yery 

 common in the western part of Ontario. (Maclagan.) 



XCm. URTICACE^:. NETTLE FAMILY. 



535. ULMUS, Linn. (ELMS.) 



(1946.) U. fulva, Michx. Slippery or Red Elm. 



U. rubra, Michaux f. N. American Sylva, Vol. II., 221, 1819. 



Ste. Anne, Champlain Co., and Nicolet, Q. (St. Cyr.) This tree 

 is chiefly confined to the valley of the St. Lawrence from the Island 

 of Orleans westward to the Georgian Bay. Its usual habitat is 



