VALLEY OP THE ST. LAWRENCE AND GREAT LAKES. 53 



Thalictrum, Tourn. Meadow Rue. 



T. anemonoides, Miclix. Rue Anemone. 



Indigenous. Open woods. As yet reported only from the Niagara Penin- 

 sula. St. Davids, Niagara District (Dr. Maclagan). Vicinity of Niagara Falls 

 (Hooper). Oaklands, Hamilton (Logie). Rare. May. 



T. dioicum, L. Early Meadow Rue. 



Indigenous. Pdch damp woods. Very abundant from Anticosti (A. E. 

 Verrill) and Labrador (Brunet) to Thunder Bay, Lake Superior (Macoun). 

 Between Severn and Trout Lake (Gov. McTa\ash). Fort Simpson, McKenzie 

 River (Prof. Lawson). Manitoba and Peace Pdver Valley (Macoun). May. 



T. Cornuti, L. Tall Meadow Rue. 



Indigenous. Low gi'ounds along streams and amid the gravel of river beds. 

 Extends from Newfoundland (J. Richardson), Anticosti (Verrill), and Labrador 

 (Brunet) to Thunder Bay, Lake Superior (Macoun). Assinaboine River (Dr. 

 Schultz, Prof. Lawson). Westward through Peace River Valley to the Rocky 

 Mountains (Macoun). Abundant. May. 



T. alpinum, L. Alpine Meadow Rue. 



Indigenous. Rocky grounds. Stem simple, nearly naked; leaves 2-3 

 ternate ; leailets roundish, somewhat lobed, crenately toothed ; flowers perfect 

 in a simple raceme, nodding ; filaments filiform ; anthers oblong-linear ; 

 carpels, few, ovate, corsile ; stigmas thick and pubescent ; stems 2' — 8' high 

 (Serene Watson, in Clarence King's Expedition of the 40°" parallel). 



Island of Anticosti (Pursh and Verrill). Newfoundland (In herb. Ba,nks). 

 Behring's Strait (S. Watson). Rocky Mountains (Parry). Rare. Fruits m 

 September. 



Ranunculus, L. Crowfoot. Buttercup. 



R. aquatilis, L. Var. tricliophyllus, Claaix. White Water Crowfoot. 



Indigenous. Lakes and streams of slow current and muddy bottom. New- 

 Brunswick (Mathews). Along the White River, Quebec (Brunet). In Ontario 

 is abundant from Prescott (Billings) to the Kaministiquia River, Lake Superior 

 (Macoun). St. Tite (Provancher). Saskatchewan (Bourgeau). Peace River 

 (Macoun). Arctic America (Hooker & Arnott). Common. July to October. 



R. multifidus, Pursh. Yellow Water Crowfoot. 



Indigenous. Ditches and muddy pools. New Brunswick (Dr. Fowler). 

 Windsor, Nova Scotia (Prof. How). Conway's Creek, Prescott (Bdlings). 

 Abundant at Belleville (Macoun). Glandford, Ont. (Logie). Maiden (Mac- 

 lagan.) Manitoba, westward to the Rocky Mountains (Macoun). Saskat- 

 chewan (Bourgeau). Extreme Arctic America, Kotzebue Sound (Hooker). 

 Common. May. 



R. multifidus, Pursh. Yar. repens., Hooker. Kidney-leaved Buttercup. 



Creeping ; lower leaves many-cleft, with linear segments ; the upper ones 

 reniform, palmately many cleft ; carpels in small globose beads ; flowers quite 

 small and bright yeUow. Creeping over the muddy bottom of creeks and 

 partially-dried poiids. North Hastings and Northern Townships of Addmgton, 

 ■ July, 1870 (Macoun). In pools west of the Assinabome River, Rocky Moun- 

 tains, and Peace River (Macoim). 



