112 GRAMINEAE 



culms slender, wiry, widely spreading or creeping, 6 to 15 inches long, flower- 

 bearing branches ascending; blades involute, arcuate, % to 1% inches long; 

 panicles narrow, interrupted, few-flowered, % to 1 inch long; glumes ovate, 

 acute, % line long, smooth; lemma exceeding the glumes, about 1 line long, 

 smooth or sparsely pubescent, acute or mucronate. 



Deserts of Inyo Co. (Funeral Mts., Coville & Funston 228), and of Arizona 



and northern Mexico. 



Refs. MUHLENBERGIA EEPENs Hitehc. Sporobolw repens Presl, Eel. Haenk. 1: 241. 1830. 



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

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

 feet in height; blades flat or usually involute, y% to 2 inches long; panicle 

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

 long; glumes ovate, % line long; lemma lanceolate, acute, mucronate, 1 line 

 long. 



Dry ground, from Lake Tahoe region (Donner Lake, Heller 7040) to San 

 Jacinto Mts. (Hall 786, 2477) ; Washington to Montana, south to Mexico. 



Eefs. MUHLENBERGIA SQUARROSA Rydb. Bull. Torr. Club 36: 531. 1909. Vilfa squarrosa 

 Trin. Mem. Acad. St. Petersb. VI. Sci. Nat. 4': 100. 1840. I", dcpuuptrata Torr.; Hook. Fl. 

 Bor. Am. 2: 257. 1840, not Muhlenbergia depauperata Seribn. ; Thurb. in Wats. Bot. Gal. 2 : 267. 

 1880. Sporobolus depauperatus Seribn. Bull. Torr. Club 10: 63. 1883. 



17. CRYPSIS Ait. 



Spikelets 1-flowered, in close depressed heads, subtended by 2 inflated 

 sheaths with thorn-like blades. Glumes obtuse. Lemma and 1-nerved palea, 

 white, membranaceous, longer than the glumes. Much branched, spreading 

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

 krupsis, hiding, from the partially concealed inflorescence.) 



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

 perate, only an inch or two wide; glumes about 1% lines long, minutely 

 hispid, about equal in length, the first narrower; lemma about as long as the 

 glumes, scabrous on keel. 



In overflowed land of the interior valley: Norman, Colusa Co., Davy; Stock- 

 ton, K. Brandegee. 



Refs. CRYPSIS ACULEATA Ait. Hort. Kew. 48. 1789. Schoenus aculeatus L. Sp. PI. 42. 

 1753. 



18. PHLEUM L. 



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

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

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

 lemma. Erect perennials w r ith flat blades. Species 10, temperate and cool 

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



Heads cylindrical, several times longer than wide 1. P. pratense. 



Heads ovoid or oblong, iy 2 to 2 times as long as broad 2. P. alpinum. 



1. P. pratense L. TIMOTHY. Culms 2 to 4 feet high, from a swollen or bulb- 

 like base; panicles long-cylindrical, 1 to 4 inches long; awn of glumes l /^ 

 line long. 



Commonly escaped from cultivation, along roadsides and in fields and waste 

 places. 



Eefs. PHLEUM PRATENSE L. Sp. PI. 59. 1753; Thurb. in Wats. Bot. Gal. 2: 262. 1880; 

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



2. P. alpinum L. Culms 8 inches to 1^ feet high, from a decumbent, some- 





