GRASS FAMILY 115 



1. E. rigens Benth. C'uhiis erect, 3 to 4 feet high; sheaths smooth or 

 slightly scabrous, eoveriug the nodes; ligule Iruiieate, \-j to 1 Hue loug; blades 

 scabrous, elongated, involute, tapering into a long slender point; panicle 

 spike-like, slender, a foot long or more; gliimes 1 to 1% lines long, oblong, 

 obtuse or somewhat arose, puberulent, convex, scarcely keeled, striate; lemma 

 slightly exceeding the glumes, seaberulous, sparsely pilose at base, ^-nerved 

 toward the nari'owed summit, awnless. 



Dry or open ground, hillsides, gullies and open forest: Butte Co. (Deep Creek 

 Cafion, Brewer 1468) to Santa Barbara {Elintr 3743), San Diego (Orcutt 520) 

 and San Jacinto Mts. {Hall 2427) ; east to New Mexico and south into Mexico. 



Refs. — Epicampes rigens Benth. Jour. Linn. Soc. Bot. 19 : 88. 1881 ; Abrams, Fl. Los Aiijj. 

 35. 1904. Ciinia macroura [Kunth, misaprliecl by] Thurb. in Wats. Bot. Cal. 2: 276. ISSd. 



22. POLYPOGON Desf 

 Spikelets ]-Howered. in dense terminal panicles. Glumes 2, ending in a long 

 slender straight awn. Lemma much shorter than the glumes, hyaline, short- 

 awned. Annual or perennial, spreading weedy grasses, with flat blades and 

 bristly panicles. — Species about 10, mostly in the Avarmer regions of the Ohl 

 World. (Greek polus, much, and pogon, beard.) 



Avnis 1/4 to lt{> lines long; panicle somewhat lobcd 1. P. lUtorali.i. 



Awns 3% to 5 lines long; panicle compact 2. P. monspelicnsis. 



1. P. littoralis Smith. Perennial; culms geniculate at base. 1 to 21/2 feet 

 high; sheatlis s<'aln-ous; ligule 1 to 2 lines long or the uppermost longer; 

 panicles oblong, 2 to 6 inches long, more or less interrupted or lobed; glumes 

 equal, scabrous on back and keel, 1 to IV2 lines long, terminated by an awn 

 as long ; lemma smooth and shining, lA line long, minutely tootlied at the 

 truncate apex ; awn about as long as the glumes. 



Introduced from Europe, from Vancouver Island to New Mexico. In Califor- 

 nia in waste places, especially along irrigating ditches at moderate altitudes, 

 from Siskiyou Co. (Butler 481) to San Diego. 



Refs.— PoLYroGON littob.\lis Smith, Comp. Fl. Brit. 13. 1800; Thurb. in Wats. Bot. Cal. 

 2: 270. 1880; Davy in Jepson, Fl. W, Mid. Cal. 42. 1901; Abrams, Fl. Los Ang. 36. 1904. 

 Agrostis littoraUs With. Arr. Brit. PI. erl. 3. 2: 129. 1796. 



2. p. monspeliensis Desf. Annual ; culms erect or decumbent at base, sca- 

 brous below panicle, depauperate or as much as 3 feet loug; sheaths smooth, 

 the ligule large ; panicles dense and spike-like, 1 to 6 inches long, i/^ to 1 inch 

 wide, tawny-yellow; glumes obtuse, hispidulous. 1 line long, terminating in an 

 awn 3 to 4 lines long; lemma as in P. littoralis. 



Introduced from Europe; common throughout California in waste places 

 and along irrigating ditches at moderate altitudes; occasional in Atlantic 

 States, common on Pacific Coast from Alaska to Jlexico. 



Refs. — PoLYPOGON MONSPELIENSIS Desf. Fl. Atlant. 1: 67. 1798; Thurb. in Wats. Bot. 

 Cal. 2: 270. 1880; Davy in Jepson, Fl. W. Mid. Cal. 42. 1901; Abrams, Fl. Los Ang. 3.5. 1904. 

 Agrostis monspeliensis L. Sp. PI. 61. 17.53. 



23. CINNA L. 

 Spikelets 1-flowered, articidated below the gliunes, in rather loose panicles. 

 Glumes 2, slightly unequal, acute. Lemma similar to the glumes, 3 to 5- 

 nerved, mucronate from between the minute teeth of the bifid apex, raised on 

 a short naked stipe, the rachilla prolonged behind the palea as a short smooth 

 bristle. Palea apparently 1-nerved, the 2 nerves close together. Stamen 1. 



