232 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



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

 Type locality: "In Pennsylvania, Virginia, Carolina." 



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

 Specimens examined: West Klickitat County, iSwtst^or/ 668, .56, 483. 



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

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



Type locality: "Habitat in Gallia. " 



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

 540; Methow River, Whited U, 213; Ellensburg, Whited 596: North Yakima, Watt, August, 

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



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



PolygonutK incaniiin Schmidt, Fl. Bocm. 4: 90. 1795. 



Type locality: Not ascertained. 



Range: British Columbia and Washington to Nova Scotia and New York, probably 

 introduced. 



Specimens examined: Visk, KreagerZW; Wavvawai, Pi/'f/', August 24, 1894. 



29. Polygonum incarnatum Eli. Bot. S. C. and Ga. 1: 456. 1817. 

 T^'PE locality: None given, but South Carolina and Georgia understood. 

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



Specimens examined: Egbert Springs, Sandherg d' Leiberg 406; Wawawai, Piper, 

 Augu.st 23, 1899. 



The above specimens ai(^ in all prol)ability introduced. 



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

 Type locality: European. 



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

 Almota, Piper 2362. 



31. Polygonum punctatum Ell. Bot. S. C. & Ga. 1: 455. 1S17. 

 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, iSul-s^Zo// 484; North Yakima, Pipr 1820; Lind.s- 

 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°, Lyall m 1858-59, west Klickitat County, Suksdorf 

 1412. 



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

 Type locality: European. 



Specimens examined: Puyallup, Piper 2320. 



Polygonum pennsylvanicum 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." 



