OATAIOGTJE OF CANADIAN PLANTS. 199 



banks of rivers. Oommon from Anticosti,' Nova Scotia, and New 

 Brunswick to the western part of Ontario, theace westward to Eed Deer 

 Eiver, Lat. 53°. {Macoun.) From Hudson Bay to the Eocky Moun- 

 tains. {Sooker.) 



251. Triosteum, Linn. (HORSE-GENTIAN.) 



(933.) T. perfoliatum, Linn. Fever-wort. 



T. majus, Michx. Fl. I., 107. 



Damp low grounds along brooks and in river valleys. Papineau 

 Woods, near Montreal. (Holmes.) Eich low woods Montreal and St. 

 Theresa, Q. (Brunei.) Chelsea, Q., near Ottawa. (Billings.) Vicinity 

 of Ottawa and westward throughout Ontario to the Georgian Bay, not 

 uncommon. 



XLIX. EUBIACB^. Madder Family. 



252. CEPHALANTHUS, Linn. (BUTTON-BUSH.) 



(934.) C. occidentalis, Linn. Button-bush. 



Muddy borders of rivers and lakes, common. Lake St. Pierre, Q. 

 (Brunei.) Gregory's Meadows, near Montreal. (Holmes.) St. Andrews, 

 Brome Lake, Knowlton and Lake Commandant, Q. (McGill Coll. Herb.) 

 Common in Ontario, extending west to the Sault Ste. Marie. 



253. HOUSTONIA, Linn. (HOUSTONIA.) 



(935.) H. purpurea, Linn. Var. clliolata, Gray. 



Hedyotis dliolata, Hook. Fl. I., 286. 



On rocky places, especially limestone, along or near rivers and lakes, 

 apparently rare. Very abundant in rocky woods along the Bay of 

 Quinte at Belleville ; shore of Chicken Bay, Lake Huron. (Macoun.) 

 Niagara Eiver, at the Whirlpool and above. (Maclagan & JDay.) 

 Vicinity of Paris, Ont. (JJogie.) 



