62 GEOLOGICAL SURVEY OP CANADA. 



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



J. RicJuxnlsonianux Roem. & Schult. ; Hook. Fl. II., 191. 



/. acMtiflorus, Hook., Fl. II., 190. 



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



/. articulal-as, var. pelocarpus. Gray, Man. Ed. XL, 482, in part. 



/. vliginoms, 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 Eiver, Guysboro Co., N.S. {Faribault.) 

 Magdalen Islands, X.S. (./. Richardson.) Truro, N.S. ; South West 

 Point, Salt Lake, and .Jupiter Eiver, AnLicosti ; Eiver Ste. Anne des 

 Monts, Gasp6, (J. {Macoun ) Island of Orleans. (St. Oyr.) Abundant 

 on sandy banks of the Eiver Eouge, 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 Erie. {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 Eiver and Athabasca; specimens from Thunder Creek, 

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

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

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

 {Macoun.) Wooded countiy to the Mackenzie Eiver; Arctic .sea-coast, 

 and from Slave Lake to the Eocky 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. ; Graj', Man. Ed. II., 481. 



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



