CATALOGUE OF CANADIAN PLANTS. 53 



(2353.) Z. venenosus, Watson, Proced. Am. Acad., XIV., 279. 



Z. Nuttallii, Gray ; Macoun, Cat. No. 1827. 

 Leimanthium Nuttallii, Hook., Fl. II., 177. 



Quite common on the upper slopes of the Cypress Hills and west- 

 ward through the foot-hills to Castle Mountain in the Eocky Moun- 

 tains. (Macoun.) Wood Mountain, 49th parallel, 1874. (Millman. 

 Burgess.) Kamloops, B.C. (Prof. .Fowler.) Lytton, B.C. (Hill.) 

 Milk Kivei- Eidge, Alberta ; Nicola Valley, and Drew Harbor, B.C. 

 North point of Texada Island, Gulf of Georgia. (Dawson.) Abun- 

 dant in the Fraser Valley ; and around Victoria, Vancouver Island. 

 (Fletcher.) Very abundant in the southern part of Vancouver Island, 

 and extending to Qualicum and Alberni. (Macoun.) Locally named 

 " Poison Camass," as the bulb is poisonous. 



(2354.) Z. paniculatus, Watson, Eep. King's Exp. V., 344. 

 Helonias paniculata, Nutt, Journ. Phil. Acad., VIL, 57. 



Apparently rare, on the great plains, as none of our collectors, so 

 far as I am aware, have even gathered the plant. According to Dr. 

 Watson it ranges from Nevada to the Saskatchewan. 



OVIII. PONTEDEEIACEJE. PICKEREL-WEED FAMILY. 

 634. PONTEDERIA. Linn. (PICKEREL-WEED.) 



(2355.) P. cordata, Linn. ; Hook., Fl. II., 187. 



Frequent in ponds and by lake margins. Marshes near Cape Blomi- 

 don, N.S, (Macoun.) Windsor, Halifax, Pictou, Mahone Bay and 

 Truro, N.S. (Sommers, Oat.) Shallow water, Caledonia, Guysboro 

 Co., N.S. (Faribault.) Kennebeccasis, near the railway station, 

 Fredericton, Grand Lake, several places on the St. John Eiver, Tobi- 

 que Lake, Norton, Clifton Lake, and common in western parts of 

 Charlotte Co., N.B. (Fowler, Cat.) Port St. Francois, Nicolet, Q. 

 (St. Cyr.) Lake St. Augustine, Q. (Thomas.) Very abundant in 

 small lakes near Lake of the Three Mountains, and in sheltered parts 

 of Trembling Lake, Argenteuil Co., Q. (J) 1 Urban.) Mouth of Eiver 

 St. Pierre, near Montreal, 1821. (Dr. Holmes.) Nation, Eideau and 

 Ottawa rivers, near Ottawa. (Fletcher, Fl. Ott.) In streams inland, from 

 Prescott northward ; very common. (Billings.) Common in all slow- 

 flowing rivers and lakes, and ponds throughout the northern counties of 



