98 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



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

 Potamog€tor\perfoliatus lanceolatiis 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. 



Specimens examined: Lake Washington, Pifter, August, 1892; Whatcom River, Gard- 

 ner 419; Lake Chelan, Dr. T. E. \\"ilcox in 1883; Fort Colvilie, Rocky Mountains, Lyall in 

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



The specimen upon which the "P. crispus L. ?" 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 Julique 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 Sc-ot ia, south to California and New Jersey. Europe. 

 Asia. 



Specimens examined: Lake Chelan, Gorman 70;i. 



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, Sitkadorf, August 1, 1890. 



11. Potamogeton calif ornicus (Morong). 



Potamogeton panciflorus californicus Morong, Bot. Gaz. 10:254. 1885. 

 Type locality: San Diego County, California. 

 Range: Washington to California. 

 Specimens 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, Piper 761 ; Okanogan River, Watson 395. 



13. Potamogeton pectinatus L. Sp. PI. 1: 127. 1H53. 

 Potamogeton columbianus 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 18.59; west Klickitat County, 

 Suksdorf 2062: White Salmon, Suksdorf22\; Okanogan River, Watson 394. 



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

 Type locality: "In Pondicherry Pond, Jefferson, N. H." 



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

 Specimens examined: Lake Cushman, Piper 2281; Henderson 1861; Lake Chelan 

 Gorman in 1898. 



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

 Glenwood, which may belong to P. amplifolius Tuck. 



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

 Bingen, which seems to be P. pectinatus L. 



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