3l6 GEOLOGICAL SURVEY OF CANADA. 



SUBGENUS X. CALLIERGON, Lesq. & James. 

 . H. cordifolium, HEDW. 



Boggy places, St. Paul and St. George islands, Behring Sea, 

 1897. (/ M. Macotm.) In bogs in wet woods, Baddeck, Cape 

 Breton Island, N.S., July, 1898. (Macoun.} Klondike River bot- 

 tom near the mouth. ( Williams.) 



919. H. giganteum, SCHIMP. 



In a swamp at Golden Lake, Ont., 1900; water holes, Crow's 

 Nest Lake, Rocky Mountains, Alta , 1897. (Macotm.) The var. 

 fluitans was found in a small stream flowing into Lake Marsh, 

 Yukon. (Williams.) 



Var. Labradorense, REN. & CARD. Bot. Gaz. Vol. XIX., p. 

 240. 



A notable variety, distinct from the type by the leaves larger 

 and longer and the costa attenuate, vanishing rather far from the 

 apex and often forking. 



Battle Harbour, Labrador, 1892. (Waghome.) 



920. H. Richardsoni, (MITT,) LESQ. & JAMES. 



Fort Chimo, Ungava Bay, Labrador, Aug., 1896. (A. P. Low.) 

 In a bog, Johnston's Lake, North Wakefield, Que., June, 1898. 

 (Macoun.) At Dawson in swamps ; in fine fruit, July 27th. (Wil- 

 liams.} 



921. H. sarmentosum, WAHL. 



In a small pond by snow banks about IOOO feet above Lake 

 Lindeman, Yukon (Williams.') 



Var. fontinaloides, BERGGREN. 



On rocks in the bottom of a small stream near the mouth of 

 Bonanza Creek, Yukon. This is a variety with long slender stems 

 and larger leaves often all green or partly green and partly pur- 

 ple. ( Williams . ) 



