232 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
27. Polygonum hydropiperoides Michx. Fl. 1: 239. 1803. 
Type Locauity: “In Pennsylvania, Virginia, Carolina.” 
Rance: Washington to New Brunswick, south to Mexico and Florida. 
SPECIMENS EXAMINED: West Klickitat County, Suksdorf 668, 56, 483. 
28. Polygonum lapathifolium L. Sp. Pl. 1: 360. 1753. 
Polygonum nodosum Pers. Syn. 1: 440. 1805. 
Type Locauity: “Habitat in Gallia.” 
SPECIMENS EXAMINED: Latitude 49°, Lyall in 1858; Southbend, Spillman; Alma, Elmer 
540; Methow River, Whited 11, 213; Ellensburg, Whited 596 ; North Yakima, Watt, August, 
1895; White Salmon, Suksdorf; Squaw Creek, Cotton 870. 
28a. Polygonum lapathifolium incanum (Schmidt) Koch, Syn. FI. Germ. 617. 1837. 
Polygonum incanum Schmidt, F]. Boem. 4: 90. 1795. 
Type Locauity: Not ascertained. 
Rance: British Columbia and Washington to Nova Scotia and New York, probably 
introduced. 
SPECIMENS EXAMINED: Usk, Hreager 360; Wawawai, Piper, August 24, 1894. 
29. Polygonum incarnatum Ell. Bot. S. C. and Ga. 1: 456. 1817, 
Tyre Locatity: None given, but South Carolina and Georgia understood. 
Rance: Vermont to Nebraska, south to Louisiana and Florida. 
SPECIMENS EXAMINED: Egbert Springs, Sandberg & Leiberg 406; Wawawai, Piper, 
August 23, 1899. 
The above specimens are in all probability introduced. 
30. Polygonum persicaria L. Sp. Pl. 1: 361. 1753. 
Tyre Locatity: 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. 1817. 
Polygonum acre H. B. K. Nov. Gen. 2: 179. 1817, not Lam. 1805. 
TYPE Locatity: South Carolina and Georgia. 
Rance: Temperate North America. 
SPECIMENS EXAMINED: White Salmon, Suksdorf 484; North Yakima, Piper 1820; Linds- 
leys Ranch, Clarke County, Henderson, September 6, 1892. 
3la. Polygonum punctatum leptostachyum (Meisn.) Small, Bull. Torr. Club 19: 
356, 1892, 
Polygonum. acre leptostachyum Meisn. in DC. Prod. 14: 108. 1856. 
Tyre Locauity: “In Amer. boreale et australi, praecipue tropica.” 
RanaeE: The whole United States and southward. 
SPECIMENS EXAMINED: Latitude 49°, Lyall in 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.”’ 
