GRASS FAMILY 187 



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

 blades. Dry woods and ravines, known only from California. 



Locs. Ft. Bragg, Davy $ Blasdale 6136; Albion, Davy $ Blasdale 6065; Cloverdale, 

 Hitchcock 2684; San Kafael, Bolander 2284; Mt. Tamalpais, Piper 6312; Yosemite Nat. Park, 

 Hitchcock 3353; Northfork, Griffiths 6650; Acton, Elmer 3750; San Bernardino Mts., Abrams 

 L'7fi_; San Jacinto Mts., Parish Bros. 1014. 



Kefs. ELYMUS GLAUCUS Buckl. 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] 

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



80. 1901, type from San Francisco, Davy. Var. caespitosus Davy 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. Reyes, Davy. Var. maximus Davy in Jepson, 

 1- 1. 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 

 Valley, Jepson. E. hispidulus Davy in Jepson, Fl. W. Mid. Cal. 79. 1901, type from Olema, 

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

 Davy 4037. E. velutinus Scribn. & 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- 

 tatiis Davy has short-awned spikelets; var. tenuis Vasey is a slender form; var. maximus Davy 

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

 (tii/iHstifoltus var. caespitosus Davy appear to be narrow-leaved forms of E. glaucus. I have 

 been unable satisfactorily to separate any of these as distinct species. 



70. SITANION Raf. 



Spikelets 2 to several-flowered, in 2's or 3's, rarely solitary, at each joint of 

 the 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 cleft or parted into 3 to many lobes. 



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



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



Glumes entire or 2-cleft or 2-parted. 



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



Glumes 2-nerved. 



Glumes entire 6. S. calif ornicum. 



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 8 inches tall; awns usually 1% to 2 

 inches long 5. S. glabrum. 



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

 smooth or scabrous; blades flat 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. 



A rare species only known from California. The habitat is not given on any 



of the specimens cited below. 



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

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

 -Mts.. .Ihrams 1814. 



Refs SITANION HANSENI J. G. Smith, U. S. Dept. Agr. Div. Agrost. Bull. 18: 20. 1899, 

 hiisfd on Elymus hanseni. Elymus hanseni Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 11: 

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

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



