VALLEY OF THE ST. LAWRENCE AND GREAT LAKES. 65 



A. perfoliata, Lam. Smooth Tower Mustard. 



Indigenous. Rocky woods and meadows. New Brunswick (Mathews). 

 Counties Hastings and Northumberland, Out. ; 15 miles up the Kaministiquia, 

 Lake Superior ; Owen Sound, Lake Huron (Macoun ; Amherstburg and islands 

 in Detroit JRiver (Maclagan). Whisky Island, Lake Huron (Dr. Bell). North 

 shore of Lake Superior (Agassiz). Valley of the Saskatchewan (Bourgeau). 

 Fort Assinaboine on the Athabasca; west of Little Slave Lake (Macoun). 

 Hudson's Bay to the Rocky Mountains (Hooker). Upper British Columbia 

 (Macoun). June. 



A. Drummondii, Gray. 



Indigenous. Rocky banks of rivers and wooded banks of streams. Rocky 

 banks of the Moira and Trent RiA^ers, Out. ; Gibson's Mountain, Prince Edward 

 County ; up the Kaministiquia River, Lake Superior ; Fishing Islands, Lake 

 Huron (Macoun). Near Prescott, Ont. (Billings). Pddeau Canal, Kingston 

 Mills, Islands in Detroit River (Maclagan). Whisky and Mississagui Islands, 

 Lake Huron (Dr. Bell). Fort Edmonton, North Saskatchewan ; Fort Assina- 

 boine on the Athabasca ; Portage between Little Slave Lake and Peace River ; 

 Peace Pviver west of the Rocky Mountains, and the Telegraph Trail Upper 

 British Columbia (Macoun). 



A. retrofracta, Graham. 



Indigenous. Plant erect, more or less canescently pubescent ; radical 

 leaves lanceolate, linear, sparingly hirsute, petioled, toothed or nearly entire ; 

 cauline leaves sagittate-amplexicaul or simply clasping ; stems several, from 

 one root, 10' — 18' high, virgate, branching near the summit; flowers, light 

 rose-colour or nearly white, small, nodding ; petals oblong-oval, the limb 

 exserted ; siliques linear, elongated, more or less retiexed ; seeds in two 

 rows, margined. This plant is readily distinguished from A. Drummondii 

 by its shorter and retrofract pods. Reported bj' Prof. Gibson from Portage 

 du Fort, Ottawa River. California to Arctic Circle (S. Watson). Hudson's 

 Bay to Rocky Mountains, and N. to lat. 68 (Hooker). Abundant west of 

 Rocky Mountains (Macoun). June. 



Barbarea, R. Brown. Water Cress. 



B. vulgaris, R. Brown. Yellow Rocket. 



Introduced. Roadsides and fields. Vicinity of Quebec (Brunet). New 

 Brunswick (Dr. Fowler). June to August. 



B. vulgaris, R. Brown. Var. Striata, Andrz. 



Indigenous. Shores of Lake Huron and Superior. Owen Sound Bay ; 

 Chicken Bay, east shore of Lake Huron ; north shore of Lake Huron ; north 

 shore of Lake Superior from Thunder Bay to Sault Ste. Marie (Macoun). 

 Mississagui Island, soiith side of St. Joseph's Island, Whisky and Cockbum 

 Islands, Lake Huron (Dr. Bell). Saskatchewan plains (Bourgeau). Edmonton, 

 North Saskatchewan (Macoun). Oregon, and N. W. America (T. &G.) Sitka 

 (Bougard). Vancouver Island; Peace River Valley (Macoun). June, July. 



B. praecox, R. Br. Tongue Grass. Scurvy Grass. 



Introduced from Europe. New Brunswick (Dr. Fowler). Canada (Goldie 

 in Hooker). Cultivated in gardens. North-western America to lat. 68°, N. 

 (Barnston). June, July. 



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