GRASS FAMILY 115 



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

 slightly scabrous, covering the nodes ; ligule truncate, % to 1 line long ; blades 

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

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

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

 slightly exceeding the glumes, scaberulous, sparsely pilose at base, 3-nerved 

 toward the narrowed summit, awnless. 



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

 Canon, Brewer 1468) to Santa Barbara (Elmer 3743), San Diego (Orcutt 520) 

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



Eefs. EPICAMPES RIGENS Benth. Jour. Linn. Soe. Bot. 19 : 88. 1881 ; Abrams, Fl. Los Aug. 

 35. 1904. Cinna macroura [Kunth, misapplied by] Thurb. in Wats. Bot. Cal. 2: 276. 1880. 



22. POLYPOGON Desf. 



Spikelets 1-flowered, 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 warmer regions of the Old 

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



Awns y 2 to l l / 2 lines long; panicle somewhat lobocl 1. P. littoralis. 



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



1. P. littoralis Smith. Perennial; culms geniculate at base, 1 to 2^ feet 

 high ; sheaths scabrous ; 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 l 1 /^ lines long, terminated by an awn 

 as long ; lemma smooth and shining, % line long, minutely toothed 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. POLYPOGON LITTORALIS 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 littoralis With. Arr. Brit. PI. ed. 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 long; sheaths smooth, 

 the ligule large ; panicles dense and spike-like, 1 to 6 inches long, % 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 Mexico. 



Refs. POLYPOGON MONSPELIEXSIS 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. 35. 1904. 

 Agrostis monspeliensis L. Sp. PI. 61. 1753. 



23. CINNA L. 



Spikelets 1-flowered, articulated below the glumes, 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. 



