1921] Smiley: Flora of the Sierra Nevada of California 89 



2. Potamogeton praelongus Wulf., in Roem. Arch. Ill, vol. 3, 



p. 331. 1805. 



Type locality. "Laboci Junic Julique in fluvio cognomine, et in 

 fluvio Jschiza. " 



Range. North America from the Gulf of St. Lawrence to British 

 Columbia, south to Connecticut, Great Lakes, Iowa, Montana, and 

 California. Northern Europe. Japan. 



Zone. Canadian. 



Specimen examined. Sierra County, Lemmon in 1874. 



3. Potamogeton alpinus Balbis, Misc. Bot., p. 13. 1804. 

 Type locality. European. 



Range. Holarctic realm; south in America to New England, 

 Michigan, Minnesota, Colorado, and California. 



Zone. Canadian. 



Specimens examined. Silver Valley, in ponds at 7,350 feet, 

 Brewer 1978 ; North Fork of Kings River, 7,000 feet, Hall and Chand- 

 ler 563. 



4. Potamogeton heterophyllus Schreb., Spicil. Fl. Lips., p. 21. 



1771. 



Type locality. "In stagno ad Lindenthal," Germany. 



Range. Holarctic realm; south in America to New England, 

 Michigan, Wyoming, and California. 



Zone. Canadian. 



Specimens examined. Soda springs, Tuolumne meadows, 8,680 

 feet, Brewer 1783; Whitney meadows (now called Volcano meadows), 

 Coville and Funston 1693 ; Tuolumne meadows, in ponds behind Par- 

 sons Lodge, 8,600 feet, Smiley 749. 



Potamogeton natans L. just reaches our lower borders (Lily Lake, 

 Tahoe, 6,600 feet, Smiley 330). 



9. JUNCAGINACEAE (ARROW GRASS FAMILY) 

 1. TRIGLOCHIN 



1. Triglochin maritima L., Sp. PI., p. 339. 1753. 

 Type locality. Europe, "Habitat in Europae maritimis." 

 Range. Subarctic America south to New England, New Jersey, 

 Colorado, and California, 



Zone. Transition and Canadian. 



