GRASS FAMILY LS7 



Var. jepsoni Davy. Distinguished by the more or less pubescent sheaths and 

 lilades. — Dry woods and ravines, known only from California. 



Locs. — Ft. Bragg, Davy 4' Blasdale 6136; Albion, Davy <j- Blasdale 6065; Clovenlale, 

 Hitchcock 2684; Sau Rafael, Bolaiider 2284; Mt. Tamalpais, Piper 6312; Yosemite Xat. Park, 

 Uilchcock 3353; Northfork, Griflitlis 6650; Acton, Elmer 3750; San Bernardino Mts., Abrams 

 2762 ; San Jacinto Mts., Farixh Bros. 1014. 



Bet's. — Elymus glaucus Buekl. Proc. Acad. Phila. 1862: 99. 1863; Davy in Jepson, Fl. 

 \V. Mid. Cal. 78. 1901; Abrams, Fl. Los Ang. 62. 1904. E. sibiricus [L. misapplied by] 

 TUurb. in Wats. Bot. Cal. 2: 326. 1880. E. angvsiifoUus Davy in Jepson, Fl. W. Mid. Cal. 

 SO. 1901, type from San Francisco, Davy. Var. raespitosus Daw in Jepson, Fl. W. Mid. Cal. 

 81. 1901, type from Berkeley Hills, Davy. E. glaucus Buckl. var. breviaristatus Davy in 

 Jepson, Fl. W. Mid. Cal. 79. 1901, type from Pt. Keyes, Davy. Var. maximus Davy in Jepson, 

 11. W. Mid. Cal. 79. 1901, type from Napa Valley, Jepson. Var. tenuis Vasey, Contr. Nat. 

 Herb. 1: 280. 1893. Var. JEPSONi Davy in Jepson, Fl. W. Mid. Cal. 79. 1901, type from Napa 

 A'alley, Jepson. E. hispididus Davy in Jepson, Fl. W. Mid. Cal. 79. 1901, type from Olenia, 

 Davy 4306b. E. divergens Davy in Jepson, Fl. W. Mid. Cal. 80. 1901, type from Petaluma, 

 Davy 4037. E. veluUnus Scrib'n. & Merr. Bull. Torr. Club 29. 466. 1902, type from Deep 

 Creek, San Bernardino Mts., Abrams 2056. E. parishii Davy & Merr. Univ. Cal. Publ. Bot. 

 1 : 58. 1902, type from Mt. San Jacinto, Hall 2097. 



Elymus glaucus is variable in habit and some of its forms, as seen from the above synonymy, 

 have received varietal names and others have been considered distinct species. Var. breviaris- 

 tatus Davy has short-avvned spikelets; var. tenuis Vasey is a slender form; var. ma.rimus Davy 

 is a large form with blades as much as 8^4 lines wide. Elymus angustifolius Davy and E. 

 angustifolius var. caespitosus Davy appear to be narrow-leaved forms of E. glaucus. I have 

 licen unable satisfactorilj- to separate any of these as distinct species. 



70. SITANION Raf. 



Spikelets 2 to several-tlowered, in 2"s or 3's, rarely solitary, at eaoli joint of 

 tlie articulate rachis. Glumes entire, bifid or several-parted, narrow or seta- 

 ceous, long-awned. Lemmas long-awned. Tufted perennials with bristly, 

 readily disarticulating spikes. — Species about 12, western North America. 

 (Greek sitos, grain for food.) 



Glumes eleft or parted into 3 to many lobes. 



Awn of lemma 1% to 4 inches long 2. S. juhatum. 



Awn of lemma 7 to 10 lines long 3. S. breriaristatum. 



Glumes entire or 2-clcft or 2-parted. 



(ilunies, or some of them, 3-nerved 1. S. hanseni. 



Glumes 2-nerved. 



Glimics entire 6. S. ealifornicum. 



Glumes, or some of them, bifid. 



Plants alpine, mostly less than 8 inches high; awns usually about 1 inch long 



4. .S'. minus. 



Plants of medium altitudes, mostly more than S inches tall; awns usually I'o to 2 



inches long 5. .S'. glabrum. 



1. S. hanseni J. G. Smith. Culms rather slender, loosely tufted; sheaths 

 smooth or scabrous; blades, tlat or involute; spike rather slender, 2 to 3 inches 

 long; glumes narrowly lanceolate, some of them 1-nerved and entire, others 

 broader and 3-nerved, often bifid; lemmas smooth, scabrous toward apex. 4 

 lines long; awns erect, about an inch long. 



.\ rare species only known from California. The hal)itat is not given on any 

 of the specimens cited below. 



Loes. — Agricultural Station, Amador Co., Hansen 1742; Santa Lucia Mts., Davy 7717; 

 Tassajara Hot Springs, Elmer 3307; Templcton, Davy 7583, 7586, 7592, 7593, 7594; Temescal 

 Mts., Abrams 1814. 



Kefs. — SiTANlON HANSENI J. G. Smith, U. S. Dejit. Agr. Div. Agrost. Bull. 18: 20. 1899, 

 based on Elymus hanseni. Elymus hanseni Scribn. (T. S. Dept. Agr. Div. Agrost. Bull. 11: 

 56. 1898, type Hansen 1742. Sitanion anomalnm J. G. Smith, II. S. Dept. Agr. Div. Agrost. 

 Bull. 18: 20. 1899, type from Pasadena, Allen; Abrams, Fl. Los Ang. 64. 1904. 



