98 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
7. Potamogeton perfoliatus richardsonii Bennett, Journ. Bot. 27: 25. 1889. 
Potamogeton perfoliatus lanceolatus Robbins in Gray, Man. ed. 5. 488. 1867, not P. lanceo- 
latus Smith, 1824-28, 
Type cocauity: ‘Along the Great Lakes.” 
Rance: British Columbia to New England, south to California and Nebraska. 
SPECIMENS 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 & 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. IIT. 3:331. 1803. 
Type Locauity: “Laboci Junio Julique in fluvio cognomine, et in fluvio Jschiza.” 
Rance: British Columbia to Nova Scotia, south to California and Pennsylvania. Europe. 
Asia. 
SPECIMENS EXAMINED: Tacoma, Fett 2160. 
9. Potamogeton lucens L. Sp. Pl. 1: 126. 1753. 
Type Locaity: ‘Hab. in Europae lacubus, stagnis, fluviis argillosis.” 
Rance: 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. 
Rance: Oregon and British Columbia to New Jersey and New Brunswick. Europe. 
SPECIMENS EXAMINED: Whatcom County, Suksdorf, August 1, 1890. 
11. Potamogeton californicus (Morong). 
Potamogeton pauciflorus californicus Morong, Bot. Gaz. 10: 254. 1885. 
TYPE LOCALITY: San Diego County, California. 
RanaceE: Washington to California. 
SPECIMENS EXAMINED: Pullman, Piper 1802. 
12. Potamogeton pusillus L. Sp. Pl. 1: 127. 1753. 
TYPE LocALity: Europe. 
Rance: 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. Pl. 1: 127. 1753. 
Potamogeton columbianus Suksdorf, Deutsch. Bot. Monatss. 19: 92. 1901. 
Type LocaLity: European. 
Rance: British Columbia to New Brunswick, south to California and Florida. Europe. 
SPECIMENS EXAMINED: Cascade Mountains, 49°, Lyall in 1859; west Klickitat County, 
Suksdorf 2062: White Salmon, Suksdorf 221; Okanogan River, Watson 394. 
14. Potamogeton robbinsii Oakes, Hovey’s Mag. 7: 180. 1841. 
Type cocauity: “In Pondicherry Pond, Jefferson, N. H.” 
Rance: Washington to New Brunswick, south to Oregon and Pennsylvania. 
SPECIMENS EXAMINED: Lake Cushman, Piper 2231; 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 in Suksdorf’s list based on a sterile plant from 
Bingen, which seems to be P. pectinatus L. 
