112 GRAJIINEAE 



culms slender, wiry, widely spreading or ereepiug. 6 to 1") inelies long, tiower- 

 beariug branehes ascending; blades involute, arcuate, 1/2 to li/o inches long; 

 panicles narrow, interrupted, few-tiowered, ^4 to 1 inch long; glumes ovate, 

 ac-ute. % line long, smooth; lemma exceeding the glumes, about 1 line long, 

 smooth or spar.sely pubescent, acute or mucrouate. 



Deserts of Inyo Co. (Funeral ]\[ts.. CoviUc d- Fitiiston 22S). and of Arizona 

 and northern ilexico. 



Eefs. — MuHLEXBER(iiA REPEXS Hitcbc. Sporvbolus rtpeiis Presl, Bel. Haeiik. 1 : 241. 1830. 



10. M. squarrosa Rydb. Perennial from numerous hard creeping rhizomes; 

 culms wiry, erect or deciuubent at base, from a few inches to as much as 2 

 feet in height; blades flat or usually involute, i/o to 2 inches long; panicle 

 narrow, interrupted, or sometimes rather close and spike-like, 1 to 6 inches 

 long; glumes ovate, Vi; Hue long; lemma lanceolate, acute, mucronate, 1 line 

 long. 



Dry ground, from Lake Tahoe region (Doiuier Lake. Hrlln- 7040) to San 

 Jacinto ^Its. (Hall 786, 2477) ; Washington to [Montana, south to Mexico. 



Eefs. — JIrHLEXBERf;i.\ squarros.'I Rydb. Bull. Tuvv. Club .Ifi: .5.'?1. 1909. Vilfa squarrosa 

 Trin. Mem. Acart. St. Petersb. VI. Sci. Nat. 4': inil. 1S4(1. I'. drpoKiHrrita Torr.; Hook. Fl. 

 Bor. Am. 2: 2.57. 1840, not Muhlenhcrriia depaiipernta Scvihn.; Tlmi'b. in Wats. Bot. Cal. 2 : 267. 

 ISSO. SiJorohohis depauperatiis Scribn. Bull. Tovr. Club 10: 63. 1883. 



17. CRYPSIS .\it. 

 Spikelets 1-tiowered. in close depressetl heads, subtended by 2 inflated 

 sheaths with thorn-like l)lades. Ghunes obtuse. Lemma and 1-nerved palea, 

 white, membranaceous, longer than the ghunes. ^lucli branched, spreading 

 annual. — Species 1, ^Mediterranean region, introduced elsewhere. (Greek 

 krupsis. hiding, from the partially concealed intlorescenee.) 



1. C. aculeata Ait. Plants prostrate, a foot in diameter, or often depau- 

 perate, oidy an inch or two wide: glumes about IVL' lines long, minutely 

 hispid. :d)out e((ual in length, the tirst narrower; lennna about as long as the 

 glumes, scabrous on keel. 



In overflowed land of the interior ^•alley; Xoriuan. ( "olusa Co.. Davy: Stock- 

 ton. A'. Brandcgec. 



Eefs. — Crypsis acule.\ta Ait. Hurt, Kew. 48. 17S9. Schoeiins acidcalus L. Sp. PI. 42. 

 1753. 



18. PHLEUM L. 



Spikelets 1-rtowered. flattened, in dense cylindrical spike-like panicles. 

 Glumes equal, ciliate on the keels, abruptly awn-pointed. Lemma shorter thau 

 the glumes, truncate, hyaline. 5-nerved. Palea narrow, about ecjualing the 

 lemma. Erect perennials with flat blades. — Species 10, temperate and cool 

 regions of tlie world, 1 a native of America. (Greek phleos. a kind of reed.) 



Heads cylindrical, several times longer than wide I. 7'. pratcnse. 



Heads ovoid or oblong, I'j to 2 times as long as broad 2. P. alpuium. 



^. P. pratense L. Ti.-mothv. Culms 2 to 4 feet high, from a swollen or bulb- 

 lik-e liase: panicles long-cylindrical, 1 to 4 inches long: awn of glumes 1/2 

 line long. 



Commonly escafted from cidtivation. along roadsides and in flelds and waste 

 places. 



Eefs.— Phlevm pr.atex.se L. Sp. PI. .59. 1753; Tburb. in Wats. Bot. Cal. 2: 202. 1880; 

 Davy in Jepson, Fl. W. Mid. Cal. 39. 1901 ; Abrams, Fl. Los Ang. 33. 1904. 



2. P. alpinum L. Culms 8 inches to IVo feet high, from a dei-umbent. some- 



