VALLEY OF THE ST. LAWRENCE AND GREAT LAKES. 63 



Loup and St. Modeste (Dr. Thomas). Rocky woods, River Rouge (D'Urban). 

 Montreal, St. Valentine, Smith's Falls, Kingston, and Chippewa (Maclagan). 

 Prescott, abundant (Billings). Woods, Belleville, Ont. (Macoun). Mountain 

 side (Hamilton). Bayfield River, Huron Co., Ont. (Gibson). May. 



D. Maxima, Nutt. Many-leaved Dentaria. 



Indigenous. In shady moist places. Found at Gait by Miss Crooks (Logie). 

 Having seen no specimens of this species from Canada, we are extremely 

 doubtful of its existence in Western Ontario, and are of the opinion that the 

 plant so designated by Logie is the D. laciniata, and that the JD. heterophylla 

 reported from Hamilton by J. M. Buchan is the same plant. May. 



D. laciniata, Mnhl. Cut-leaved Dentaria. 



Indigenous. Rich shady woods and low grounds. Valley of the St. Francis, 

 rare (Brunet). Ameliasburgh, P. E. County, Ont. (Macoun). Banks of Cove, 

 common, London (Saunders). Mountain west of Hamilton (Logie). Chip- 

 pewa, Navy Island and Maiden (Maclagan). Penetanguishene (Hooker, Fl. 

 Bor. Am.) Rare. May. 



Cardamine, L. Spring Cress. 

 C. rliomboidea, DC. Spring Cress. 



Indigenous. Wet meadows and springs. Meadow near Stinson's Mills ; 

 wet woods east of Belleville (Macoun). Wet places, common (Saunders). Gait 

 (Kate Crooks). Maiden, Ont. (Maclagan). Rare. May, June. 



C. rliomboidea, DC. Yar. purpurea, Torrey. 



Indigenous. Moist woods and springs. London, Ont. (A. T. Drummond). 

 Woods west of Hamilton (Logie). Rare. May, June. 



C. rotundifolia, Michx. Mountain Water-cress. 



Indigenous. Cool shaded springs. Chippewa and St. Catharines (Maclagan). 

 Hudson's Bay, Rocky Mountains, Lake Superior ( Torr. & Gray). Rocky 

 Mountain defiles, lat. 52° to 51° N. (Drummond). Ptare. May. 



C. pratensis, L. Cuckoo Flower. 



Indigenous. Wet meadows and swamps. Swamps, Labrador and Quebec 

 (Brunet). Near Ottawa and Prescott Railway ; vicinity of Prescott Junction 

 (Billings). Three miles south of Ottawa (Billings). Meadows and swamps, 

 JBelleville (Macoun). Near Millgrove, Ont. (Logie). Shore along Lake BurweU, 

 Co. Lambton, Ont. (Gibson). Whisky Island, Georgian Bay (Dr. Bell). Arctic 

 Islands, Behring Straits, and Hudson's Bay (G. Barnston). May, June. 



C. Mrsuta, L. Common Bitter Cress. 



Indigenous. In rivulets, springs, and ditches. Very common from mouth 

 of the St. Lawrence through Quebec and Ontario to Lake Superior. Fort 

 Assinaboine on the Athabasca ; Little Slave Lake ; Dunvegan and Fort St. 

 John, Peace River (Macoun). Arctic Sea coast (Barnston). Arctic America 

 (Torr. & Gray). British America (Richardson). West coast of Newfoundland 

 (Dr. Bell). Throughout the season. 



C. hirsuta, L. Yar. sylvatica, Gray. Bitter Cress. 



Indigenous. Dry rocks, especially Lattrentian. Rocks of the Montmorenci 

 Falls (Brunet). Dry Laurentian rocks at ShannonviUe, Ont. (Macoun). Gait 



