232 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



27. Polygonum hydropiperoides Michx. Fl. 1 : 239. 1803. 

 . Type locality: " In Pennsylvania, Vii^inia, Carolina. " 



Range: Washington to New Brunswick, south to Mexico and Florida. 

 SpEcniENS examined: West Klickitat County, Suksdotf 668, 56, 483. 



28. Polygonum lapathifolium L. Sp. PI. 1 : 360. 1753. 

 Polygonum nodosum Pers. Syn. 1: 440. 1805. 



Type locality: " Habitat in Gallia. " 



Specimens examined: Latitude 49°, Lyall in 1858; Southbend, Spillman; Alma, Elmer 

 &40; Methow River, WhiledU, 213; Ellensburg, Whited 596;^ North Yakima, Watt, August, 

 1895; White Salmon, Suksdorf; Squaw Creek, Cotton 870. 



28a. Polygonum lapathif olium incanum (Schmidt) Koch, Syn. Fl. Germ. 617. 1837. 



Polygonum incanum Schmidt, Fl. Boem. 4: 90. 1795. 



Type locality: Not ascertained. 



Ranoe: British Columbia and Wa.shington to Nova Scotia and New York, probably 

 introduced. 



Specimens examined: Usk, Kreager 360; Wawawai, Piper, August 24, 1894. 



29. Polygonum incamatum Ell. Bot. S. C. and Ga. 1 : 456. 1817. 

 Type ixk'ality: None given, but South Carolina and Georgia understood. 

 Range: Vermont to Nebra.ska, south to Louisiana and Florida. 



Specimens examined: Egl)ert Springs, Sandberg <fc Leiberg 406; Wawawai, Piper, 

 August 23, 1899. 

 The above specimens are in all probability introduced. 



30. Polygonum persicaria L. Sp. Pi. 1: 361. 1753. 

 Type l(X'ai.ity: Eiirop<>an. 



Specimens examined: Seattle, Savage 47; Puyallup, Piper 2364; Tacoma, Flett 126; 

 Almota, Piper 2.362. 



31. Polygonum punctatum Ell. Bot. S. C. & Ga. 1: 455. 1817. 

 Polygonum acre II. B. K. Nov. Gen. 2: 179. 1817, not Lam. 1805. 

 Type locality: South Carolina and Georgia. 



Range: Temperate North America. 



Specimens examined: White Salmon, Suksdorf 4Si; North Yakima, Pipfr 1820; Linds- 

 leys Ranch, Clarke County, Henderson, September 6, 1892. 



31a. Polygonum punctatum leptostachyum (Meisn.) Small, Bull. Torr. Club 19: 

 356. 1892. 



Polygonum acre leptostachyum Meisn. in DC. Prod. 14: 108. 1856. 



Type locality. "In Amer. boreale et australi, praecipue tropica." 



Range: The whole United States and southward. 



Specimens examined: Latitude 49°, LyaU in 1858-59; west Klickitat County, Suksdorf 

 1412. 



32. Polygonum hydropiper L. Sp. PI. 1: 361. 1753. 

 Type locality: European. 



Specimens examined: Puyallup, Piper 2320. 



Polygonum pennstlvanicum L. appears on Suksdorf' s list, credited to Klickitat County. 

 We have seen no Washington specimens. 



Pterostegia drymarioides Fisch. & Mey. Ind. Sem. Hort. Petrop. 2: 23. 1835. Type 

 locality, "In portu Bodega Novae Californiae." Included by Suksdorf in his list, but 

 he writes that he has seen no Washington specimens. A specimen in the Gray Herbarium 

 is labeled "Columbia, Tolmie." 



