98 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



7. Potamogeton perfoliatus richardsonii Bennett, Journ. Bot. 27: 25. 1889. 

 Potamogeton perfoliatus lanceolafus Robbins in Gray, Man. ed. 5. 488. 1867, not P. lanceo- 



latus Smith, 1824-28. 



Type locality: "Along the Great Lakes." 



Range: British Columbia to New England, south to California and Nebraska. 



Specimen.s examined: Lake Washington, Piper, August, 1892; Whatcom River, Gard- 

 ner 419; Lake Chelan, Dr. T. E. Wilcox in 1883; Fort Colville, Rocky Mountains, Lyall in 

 1861; Lake Chelan, Gorman 677; Prosser, Griffiths cfc Cotton 809. 



The specimen upon which the "P. crispiis L. V of Suksdorf's list is based proves to be a 

 sterile specimen of the above from Lake Washington. 



8. Potamogeton praelongus Wulf. Roem. Arch. IIL 3:331. 1803. 



Type locality: ''Laboci Junio Julicjue in fluvio cognomine, et in fluvio Jschiza." 

 Range: British Columbia to Nova Scotia, south to California and Pennsylvania. Europe. 

 Asia. 



Specimens examined: Tacoma, Flett 2160. 



9. Potamogeton lucens L. Sp. PI. 1: 126. 1753. 



Type locality: "Hab. in Europae lacubus, stagnis, fluviis argillosis." 

 Range: British Columbia to Nova Scotia, south to California and New Jersey. Europe, 

 Asia. 



Specimens examined: Lake Chelan, Gorman 703. 



10. Potamogeton zosteraefolius Schum. Enum. PI. Saell. .50. 1801. 

 Type locality: Saellandia. 



Range: Oregon and British Columbia to New Jersey and New Brunswick. Europe. 

 Specimens examined: Whatcom County, Srtksdorf, August 1, 1890. 



11. Potamogeton calif ornicus (Morong). 



Potamoijcton panciflorus californiciis Morong, Bot. Gaz. 10:254. 1885. 

 Type locality: San Diego County, California. 

 Range: Washington to California. 

 vSpecimens examined: Pullman, Piper 1802. 



12. Potamogeton pusillus L. Sp. PI. 1: 127. 1753. 

 Type locality: Europe 



Range: British Columbia to New Brunswick, south to California, Texas, and Virginia. 

 Europe. 



Specimens examined: Seattle, Pi/Jt/' 761 ; Okanogan River, lFa/so7i 395. 



13. Potamogeton pectinatus L. Sp. PI. 1: 127. 1753. 

 Potamogeton colnnibianiis Suksdorf, Deutsch. Bot. Monatss. 19: 92. 1901. 

 Type locality: European. 



Range: British Columbia to New Brunswick, south to California and Florida. Europe. 

 Specimens examined: Cascade Mountains, 49°, Lyall in 1859; west Klickitat County, 

 Suksdorf 2m2: White Salmon, 5«/:sfZo// 221; Okanogan River, Watson 394. 



14. Potamogeton robbinsii Oakes, Hovey's Mag. 7: 180. 1841. 

 Type locality: "In Pondicherry Pond, Jefl'erson, N. H." 



Range: Washington to New Brunswick, south to Oregon and Pennsylvania. 

 Specimens examined: Lake Cushman, Piper 2231; Henderson 1861; Lake Chelan 

 Gorman in 1898. 



Potamogeton pulciier Tuck, is listed by Suksdorf. The basis is a sterile plant from 

 Glenwood, which may belong to P. amplifoiius Tuck. 



Potamogeton marinus L. is included in Suksdorf's list based on a sterile plant from 

 Bingen, which seems to be P. pectinatus L. 



