PIPER FLORA OF THE STATE OF WASHINGTON. 149 



Specimens examined: Wenaclit', WhiieJm 1895; North Yakima, Watt, Ju\y, ISUo; Opiiir, 

 Elmer 512; Coupevillo, Gardner 320, 334. 

 Zonal distribittion: Transition and Upper Sonoraii. 

 The Agropyron (jlaiicuin of Suksdorf's List is based on specimens of .1. occiderifale. 



11. Agropyron repens (L.) Beauv. Agrost. 102, 14(1. 1.S12. Quack grass. 



Triticuni repens L. Sp. PI. 1: 8o. 1753. 



Type locality: "IIal)ita; in Europae cultis." 



Specimens examined: \'aneouver, Piper, July 20, 1807; \\'alhi Walla, Lecl-enhy, Jiil\' 18, 

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



HORDEUM. Wild I5ARLEY. 



Floret of the central spikelet pediceled; cjlumes ciliate 1. II. murinuni. 



Floret of the central spikelet sessile; glumes not ciliate. 

 Glumes all alike, subulate. 



Lateral florets long-awned. 



Awns 4 to 6 cm. long 2. II. juhatuin. 



Awns 2 to 3 cm. long. 



Sheaths and blades glabrous 3. II. caespitoaum. 



Sheaths and blades pilose 4. //. comosum. 



Lateral florets not awned. 



Lateral florets neutral 5. //. nodosum. 



Lateral florets perfect 6. //. boreale. 



Glumes not all subulate, the inner ones obliquely- lanceolate 7. //. geniciilatnm. 



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

 Type locality; "Habitat in Europae locis ruderatis." 



Specimens examined: Seattle, Piper; Tacoma, Piper 20C2; Ellensburg, Piper 2582; 

 Waitsburg, Horner 246; Almota, Piper 3560; \Yii\hi\a., Cotton 1045. 



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

 Ty'pe 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 1740; Spokane, Pijier, 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 exa.mined: Tacoma, LecJcenhy, June 3, 1898; Alma, Elmer 535; near Colum- 

 bus, SuJcsdorf 218; without locality, Sandherg dc Leiberg 245; Ephrata, Griffiths & Cotton 

 463; Priest Rapids, Cotton 1384, 1404; Kiona, Cotton 718; Grand Coulee, Grffiths & 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 tf- Cotton 303. 



Zonal distribution : Arid Transition. 



5. Hordeum nodosum L. Sp. PI. ed. 2. 1: 12G. 1762. 

 Type locality; "Habitat in Italia, Anglia." -^ 

 Range: North temperate America, Asia, and Europe. 



