t> GEOLOGICAL SURVEY OF CANADA. 



(2380.) J. alpinus, Villars., var. insignis, Fries. 



/. Richardsonianus Roem. & Sohult. ; Hook. Fl. II., 191. 



/. acutiflorus, Hook., Fl. II., 190. 



/. pelocarpus, Gray, Man. Ed. 1., 507, in part. 



J. articulatus, var. pelocarpus, Gray, Man. Ed. II., 482, in part. 



/. uliginosus, var. minor, Hook., Fl. II., 191. 



Very abundant by lake and river margins, in sand or gravel. Very 

 often in the water, and sometimes floating or reclining or rooting in 

 the mud.' On sand, Liscomb .River, Guysboro Co., N.S. (Faribault.) 

 Magdalen Islands, N.S. (J. Richardson.} Truro, N.S. ; South West 

 Point, Salt Lake, and Jupiter River, Anticosti ; River Ste. Anne des 

 Monts, Gaspe*, Q. (Macoun } Island of Orleans. (St. Oyr.} Abundant 

 on sandy banks of the River Rouge, Argenteuil Co., Q. (D' Urban.} 

 Muddy or gravelly places along the Ottawa. (Fletcher, Fl. Ott.} 

 Ditches and boggy places, at Prescott, Ont. (Billings.} Common in 

 wet sandy places along the Great Lakes and throughout central 

 Ontario. (Macoun.} Wet gravelly shore, Parry Sound, Georgian Bay ; 

 at Southampton, Ont. ; Point aux Pins, Lake Brie. (Burgess.} Vicinity 

 of Hamilton, Ont. (Buchan.} Very abundant along all the^ water courses 

 and fresh water lakes in the prairie region, and extending north 

 to the Peace River and Athabasca; specimens from Thunder Creek, 

 Cypress Hills, Bow River at Calgary ; Kananaskis, Castle Mountain and 

 Kicking Horse Lake, in the Rocky Mountains ; abundant on the 

 borders of Home, Cameron and Shawnigan lakes, Vancouver Island. 

 (Macoun.} Wooded country to the Mackenzie River; Arctic sea-coast, 

 and from Slave Lake to the Rocky Mountains. (Hooker, Fl.} Two 

 remarkable forms of this species have been gathered on Vancouver 

 Island. A form floating on mud in a small lake at the Wellington 

 Mine, Departure Bay, exactly matches specimens received from the 

 British Museum without a name, gathered by Barclay at Port Etches, 

 Alaska. The other is a tall, less compact form than the species, with 

 longer scales, and in most cases two or more viviparous flowers in the 

 heads. The latter was collected at Home Lake, July 27, 1887. 



(2381.) J. militaris, Bigelow, Fl. Bost. Ed. II. 139, (1824.) 



Apparently very rare in the Maritime Provinces. Wet places, 

 Caledonia, Guysboro Co., N.S. (Faribault.} Near St. Stephen, N.B. 

 ( Vroom} 



(2382.) J. acuminatus, Michx., var. a. legitimus, Engelm., 

 Mon. June., 463. 



/. acuminatus, Michx., Fl. I., 192. 



J. paradoxus, E. Meyer. ; Gray, Man. Ed. II., 481. 



J.fraternus, Kunth. Enum. III., 332. 



