PIPER FLORA OF THE STATE OF WASHIISTOTON. 149 



Specimens examined: Wenacho, Whited in 1895; North Yakima, Watt, July, 1895; Ophir, 

 Elmer 512; Co-jpeville, Gardner 320, 334. 

 Zonal distribution: Transition and Upper Sonoran. 

 The Agropyron glaucum of Suksdorf's List is based on specimens of A. occidentale. 



11. Agropjnro-i repens (L.) Beauv. Agrost. 102, 146. 1812. Quack grass. 



Triticum repens L. Sp. PL 1 : 86. 1753. 



Type locality: "Habitat in Europae culLis." 



Specimens examined: Vancouver, Piper, July 20, 1897; Walla Walla, LecJcenby, July 18, 

 1899; North Palouse River, Vasey, July 3, 1901. 



HORDEUM. Wild barley. 



Floret of the central spikelet pediceled; glumes ciliate 1. H. murinum. 



Floret of the central spikelet sessile; glumes not ciliate. 

 Glumes all alike, subulate. 



Lateral florets long-awned. 



Awns 4 to 6 cm. long 2. H. juhatum. 



Awns 2 to 3 cm. long. 



Sheaths and blades glabrous 3. H. caespitosum. 



Sheaths and blades pilose 4. H. comosurn. 



Lateral florets not awned. 



Lateral florets neutral 5. //. nodosum. 



Lateral florets perfect 6. //. boreale. 



Glumes not all subulate, the inner ones obliquely lanceolate 7. H. geniculatum. 



1. Hordeum murinum L. Sp. PI. 1: 85. 1753. Wall barley. 

 Type locality: "Habitat in Europae locis ruderatis." 



Specimens examined: Seattle, Piper; Tacoma, Piper 2602; Ellensburg, Piper 2.582; 

 Waitsburg, Horner 246; Almota, Piper a560; Wallula, CoMon 1045. 



2. Hordeum. jubatum. L. Sp. PI. 1: 85. 1753. Squirrel tail. 

 Type locality: "Habitat in Canada." 



Range: Alaska to Ontario, south to California and Kansas. 



Specimens examined: Seattle, Piper in 1889; North Yakima, Henderson 2208; Par- 

 ker, A. D. Dunn, August 11, 1901; Pullman, Piper 1746; Spokane, Piper, June, 1897; 

 Steptoe, Vasey 49. 



Zonal distribution: Arid Transition and Upper Sonoran. 



3. Hordeum caespitosum Scribn. Proc. Davenp. Acad. Sci. 7: 245. 1899. 

 Type locality: Edgemont, South Dakota. 



Range: Washington to Assiniboia, Kansas, and Utah. 



Specimens examined: Tacoma, Leckenby, June 3, 1898; Alma, Elmer 535; near Colum- 

 bus, Sutsdor/ 218; without loc&lity, Sandberg c& Leiberg 245; Eiphrata, Griffiths <& Cotton 

 463; Priest Rapids, Cotton 1384, 1404; Kiona, Cotton 718; Grand Coulee, Griffiths cfc Cotton 

 445. 



Zonal distribution: Arid Transition. 



4. Hordeum comosum. Presl, Rel. Haenk. 1: 327. 1830. 

 Type locality: Chile. 



Range: Washington. Chile. 



Specimens examined; Alma, Elmer 535; Colville Reservation, Griffiths cfc Cotton 363. 



Zonal distribution: Arid Transition. 



5. Hordeum nodosum L. Sp. PI. ed. 2. 1: 126. 1762. • 

 Type locality: "HaWtat in Italia, Anglia." 



Range: North temperate America, Asia, and Europe. 



