GRASS FAMILY 89 



cate awns between the ciliate lobes of the apex; lateral spikelets similar, nar- 

 rower, the glumes less awned at the tip, the second floret similar to the first. 



Mohave and Colorado deserts, east to Arizona and south into Mexico. 



Locs. Palm Springs, Parish 4145; Whitewater, Parish Bros. 880; Newberry, Chase 5787; 

 Barstow, Hall $ Chandler 6844; Mountain Spring, Schoenfeldt 3082; San Felipe, Brandegee 

 89; San Jacinto Mts., Hall 2118. 



Befs. PLEUBAPHIS RIGIDA Thurb. in Wats. Bot. Cal. 2: 293. 1880. Hilaria rigida Benth.; 

 Scribn. Bull. Torr. Club 9: 33. 1882. 



2. P. jamesii Torr. GALLETA. Culms glabrous, the nodes villous; sheaths 

 glabrous or slightly scabrous, sparingly villous around the short membran- 

 aceous ligule; blades mostly 1 to 2 inches long, 1 to 2 lines wide, rigid, soon 

 involute, the upper reduced ; spikelets 3 to 4 lines long, long-villous at base ; 

 glumes of central spikelet pubescent, cuneate, 2-lobed, the lobes 2 or 3-awned, 

 the central nerve between, extending from below the middle into an awn some- 

 what longer than the others, the awns all minutely plumose; lemma erose at 

 apex, glabrous, 3-nerved, the nerves parallel, the central extending into a 

 short awn; glumes of lateral spikelets narrow, pubescent, the first unsym- 

 metrical, 5-nerved, the second nerve on one side extending into a dorsal awn 

 from below the middle, the apex unequally 2-lobed, the sinus extending down 

 about half-way to the point of departure of the awn, the lobes minutely ciliate ; 

 second glume 5-nerved, awnless, entire, ciliate, conduplicate around the floret; 

 lemma as in fertile spikelet; stamens 2. 



Deserts of Inyo Co. : Argus Mts., Hall & Chandler 7086 ; Coso Mts., Coville & 

 Funston 915. Extends east to Wyoming and Texas, and south into Mexico. 



Eefs. PLEUBAPHIS JAMESII Torr. Ann. Lye. N. Y. 1: 148. pi. 10. 1824. Hilaria jamesii 

 Benth. Jour. Linn. Soc. Bot. 19: 62. 1881. 



TRIBE III. PANICEAE. 

 5. DIGITARIA Scop. 



Spikelets with 1 perfect flower, sessile or short-pediceled, solitary or in 2's 

 or 3's, in 2 roM r s on 1 side of a continuous narrow or winged rachis, forming 

 slender spike-like racemes, aggregated toward the summit of the culm. Glumes 

 1 to 3-nerved, the first small, sometimes obsolete. Sterile lemma 5-nerved, 

 membranaceous. Fertile lemma leathery-indurated, papillose-striate, with a 

 flat hyaline margin. Annual or perennial, mostly weedy grasses with subdigi- 

 tate inflorescence. Species about 50, mostly natives of the warmer parts of the 

 Old World, several species being introduced weeds in the New World. (Greek 

 digitus. a finger.) 



1. D. sanguinalis Scop. CRAB-GRASS. Annual, usually much-branched at 

 base; culms 1 to 3 feet long, geniculate-spreading, or creeping and rooting at 

 the nodes, the flower-stalks more or less erect ; sheaths more or less papillose- 

 hirsute ; blades lax, 3 to 5 inches long, 2 to 5 lines wide, often pilose ; racemes 

 3 to 12, subdigitate, 2 to 5 inches long; rachis with lateral angles winged; 

 spikelets in pairs, iy 2 to 1% lines long, usually appressed-pubescent between 

 the smooth or scabrous nerves; pedicels angled; first glume minute; second 

 glume about y 2 as long as the spikelet. 



A native of the Old World, now a common weed in the warmer parts of the 

 western hemisphere. Cultivated soil and waste places, central and southern 

 parts of the state, especially in the interior valleys. 



Eefs. DIGITARIA SANGUINALIS Scop. Fl. Cam. ed. 2. 1: 52. 1772. Panicum sanguinale 

 L. Sp. PI. 57. 1753; Thurb. in Wats. Bot. Cal. 2: 258. 1880; Davy in Jepson, Fl. W. Mid. 

 Cal. 31. 1901. Syntherisma sanguinalis Dulac, Fl. Haut. Pyr. 77. 1867; Abrams, Fl. Los Ang. 

 23. 1904. 



