PIPER—FLORA OF THE STATE OF WASHINGTON. 105 
PANICUM. 
Spikelets in one-sided racemes, awned; summit of the palet free... . - 1. P. crus-galli. 
Spikelets in open panicles, awnless; summit of the palet inclosed in 
glume. 
Annual, spikelets pointed. 
Culms 15 to 25 em. high, slender; spikelets 2.5mm. long... 2. P. barbipulvinatum. 
Culms 40 em. or more high, stout; spikelets 3.5mm. long . 3. P. hirticaulum. 
Perennial, spikelets obtuse. 
Culms stout; spikelets 3mm. long........-.--.-.------- 4. P. seribnerianum., 
Culms slender; spikelets 1.5 mm. long. ........-.------- | 5. P. occidentale. 
1. Panicum crus-galli L. Sp. Pl. 1: 56. 1753. BARNYARD GRASS. 
Type Locatity: ‘ Habitat in Europae et Virginiae cultis.” 
Rance: 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, Suksdorf 2329; Almota, 
Piper, September, 1896; Wawawai, Lake 87; Davis Lake, Kreager 441; Marcus, Kreager 460. 
2. Panicum barbipulvinatum Nash, Mem. N. Y. Bot. Gard. 1: 21. 1900. 
Panicum capillare brevifolium Vasey, U. 5. Dept. Agr. Div. Agrost. Bull. 5: 21. 1897, 
not P. brevifolium L. 1753. 
Tyre Loca.iry: “Manhattan, on a shaded sand bar in the Gallatin River,’ Montana. 
Rance: Washington to Montana. 
SPECIMENS EXAMINED: White River, Vasey 66; Chelan, Elmer 484, 848; Kittitas County, 
Sandberg & Leiberg 431; North Yakima, Henderson 2219; Watt, August, 1895; Fort 
Colville, Lyall in 1860; Watson 445; Whitman County, Lake & 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. 1830. 
Type Locauity: ‘Hab. ad Acapulco, Mexico.” 
Rance: Washington to Mexico. 
SPECIMENS EXAMINED: Near Bingen, Suksdorf 2320. 
ZONAL DISTRIBUTION: Upper Sonoran. 
4. Panicum scribnerianum Nash, 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 Locatity: “ 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. seribnerianum. 
With little doubt also the ‘Columbia River specimens referred by Hooker to P. viscidum E)l. 
are the same. 
5. Panicum occidentale Scribn. Ann. Rep. Mo. Bot. Gard. 10: 48. 1899. 
Panicum pubescens Lam. err. det. Presl, Rel. Haenk. 1: 306. 1830. 
Type Locauity: “Hab. in Nootka-Sund,’’ Vancouver Island. 
Rance: British Columbia, Washington, and Idaho. 
SPECIMENS EXAMINED: Cascade Mountains, 49°, Lyall in 1859; Woodlawn, Henderson, 
June 22, 1892; Yelm, Smith, July 20, 1890; Enumclaw, Vasey 72; Montesano, /eller 3978; 
