PIPER FLORA OF THE STATE OF WASHINGTON. 105 



PANICTJM. 



Spikelets in one-sided racemes, awned ; summit of the palet free LP. crus-galli. 



Spikelets in open panicles, awnless; summit of the palet inclosed in 

 glume. 



Annual, spikelets pointed. 



Culms 15 to 25 cm. high, slender; spikelets 2.5 mm. long ... 2. P. harbipulvinatum. 

 Culms 40 cm. or more high, stout; spikelets 3.5 mm. long . 3. P. hirticaulum. 

 Perennial, spikelets obtuse. 



Culms stout; spikelets 3 mm. long 4. P. scrihnerianum. 



Culms slender; spikelets 1.5 mm. long 5. P. occidentale. 



1. Panicum crus-galli L. Sp. PI. 1: 56. 1753. Barnyard grass. 

 Type locality: "Habitat in Europae et Virginiaecultis." 



Range: A native of Europe widely established as a weed. 



Specimens examined: Seattle, Piper; Alma, Elmer 530; North Yakima, Watt, August, 

 1895; Parker, A. D. Dunn, August 8, 1901; west Klickitat County, Sulcsdorf 2329; Almota, 

 Piper, September, 1896; Wawawai,Z,ate87; Davis Lake, ^reagrer 441; M&rcus, Kreager4&). 



2. Panicum barbipulvinatum Nash, Mem. N. Y. Bot. Gard. 1: 21. 1900. 



Panicum capillare hrevifolium Vasey, U. S. Dept. Agr. Div. Agrost. Bull. 6: 21. 1897, 

 not P. hrevifolium L. 1753. 



Type locality: "Manhattan, on a shaded sand bar in the Gallatin River," Montana. 



Range: Washington to Montana. 



Specimens examined: White River, Fasej/ 66; Chelan, £7m«r 484,848; Kittitas County, 

 Sandberg <& Leiberg 431; North Yakima, Henderson 2219; Watt, August, 1895; Fort 

 Colville, Lyall in 1860; Wation 445; Whitman County, Lake <fc Hull 63; Dry Creek, 

 Whitman County, Vasey 65; Yelm Prairie, Piper in 1888. 



Zonal distribution: Upper Sonoran and Transition. 



3. Panicum hirticaulum Presl, Rel. Haenk. 1: 308. 1&30. 

 Type locality: "llab. ad Acapulco, Mexico." 



Range: Washington to Mexico. 



Specimens examined: Near Bingen, Switsrfor/" 2320. 



Zonal distribution: Upper Sonoran. 



4. Panicum scribnerianum Na^h, Bull. Torr. Club 22: 421. 1895. 



Panicum scoparium minor Scribn. Bull. Univ.Tenn. 7: 48. 1894, not Panicum pubescens 

 minus Poir. : Lam. Encycl. 4: 272. 1816. 



Type locality: "Middle Tennessee." 



Range: Maine to Washington, south to Alabama and Arizona. 



Specimens examined: Alki Point, Piper 804; Seattle, Smith 804; Tacoma, Flett 11; 

 American Lake, Smith, May, 1890; between Olympia and Gate City, Heller 4058; Cascade 

 Mountains, 49°, Lyall in 1859, Ophir, Elmer 509; Old Fort Colville, Watson 443; Wawawai, 

 Elmer 763; Brodie, June, 1898. 



Zonal distribution : Upper Sonoran and Transition. 



All references of Panicum scoparium Lam. to Washington refer to P. scribnerianum. 

 With little doubt also the Columbia River specimens referred by Hooker to P. w«ci</uTO Ell. 

 are the same. 



5. Panicum occidentale Scribn. Ann. Rep. Mo. Bot. Ga^-d. 10: 48. 1899. 

 Panicum pubescens Lam. err. det. Presl, Rel. Haenk. 1:306. 1830. 



Type locality: "Hab. in Nootka-Sund," Vancouver Island. 

 Range: British Columbia, Washington, and Idaho. 



Specimens examined: Cascade Mountains, 49°, Lyall in 1859; Woodiawn, Henderson, 

 June 22, 1892; Yelm, Smith, July 20, 1890, Enumclaw, Vasey 72; Montesano, Heller 3978; 



