GRASS FAMILY 101 



Locs. Bakersfield, Davy 1895, Los Angeles, Hasse; Pasadena, Jones 3216; Pedley Sta., 

 Seed 1128; San Jacinto, Hasse; San Diego, Orcutt. 



Bef . ARISTIDA DIVABICATA Humb. & Bonpl. ; Willd. Enum. PI. 1 : 99. 1809. 



5. A. parishii Hitchc. n. sp. Perennial; culms tufted, 1 to 2 feet high, 

 smooth; sheaths smooth, ciliate at the throat; blades ascending, firm, flat or 

 more or less involute, scabrous on the upper surface, smooth below or sca- 

 brous toward the tip, y 2 to 1 line wide, 6 to 12 inches long; panicle narrow, 

 about 6 inches long, the branches rather stout, ascending or appressed, the 

 lower ] to 2 inches long; glumes somewhat unequal, short-awned, smooth or 

 scabrous on the keel, 1-nerved or the first 3-nerved, the second a little longer, 

 6 lines long; lemma a little shorter than the second glume, very scabrous on 

 the upper half, the neck rather stout, riot twisted, the awns ascending, the 

 centra] about 10 lines long, the lateral a little shorter. (Perennis, caespitosa, 

 1-2 ped. alta, glabra ; vagina ore ciliata ; laminae firmae planae vel plus minus 

 involutae, supra scabrae, i-l lin. latae, 6-12 poll, longae; panicula angusta. 

 circa 6 poll, longa, ramis ascendentibus ; glumae subaequales, breviter aristatae, 

 1-nerviae vel prima 3-nervia; lemma glumis brevius, parte superiore scaberri- 

 mum, aristis ascendentibus, intermedia circa 10 lin. longa, quam ceteris 

 breviore. ) 



Type in the U. S. National Herbarium, collected by S. B. & W. F. Parish at 

 Agua Caliente, Colorado Desert, Apr., 1882 (no. 1029a). Other specimens 

 referred to this species are: San Diego, Cleveland; Cohuila Creek, San Jacinto 

 For. Res., Leiberg 3188 ; Jurupa Hills, Wilder 1047y 2 . Differs from A. divari- 

 cata chiefly in the shape of the panicle, the branches being short and appressed 

 instead of long and divaricate. 



6. A. californica Thurb. Perennial; culms cespitose, much-branched at 

 base, 6 inches to 1 foot high; blades short, involute, sharp-pointed, i/> to 1^ 

 inches long ; panicles numerous, loose, 1 to 2 inches long, the few branches few- 

 flowered; glumes smooth or the first slightly scabrous near apex, 1-nerved, 

 awuless, unequal, the first 4 lines long, the second about twice as long; lemma 

 3 lines long, smooth, except the short-pubescent callus, nearly 1 line long, the 

 narrowed apex articulated with the slender, spirally twisted, 9 lines long neck 

 of the awns; awns equal, spreading, about 1 inch long. 



Deserts of southern California, Arizona and northern Mexico. The Needles, 

 Jones 68a; Borrego Springs, Brandegee 106. 



Kefs/ ARISTIDA CALIFORXICA Thurb.; Boland. Trans. Cal. Agr. Soc. 134. 1864, nomen 

 nudum; Thurb. in Wats. Bot. Cal. 2: 289. 1880, the original specimens cited are: Colorado 

 Desert (Sclwtt) and Fort Mohave (Cooper). Var. fugitiva Vasey, Contr. Nat. Herb. 3: 

 49. 1892, type from the Colorado Desert, Orcutt 1486. A. jonesii Vasey, 1. e. 48, as a synonym 

 under A. californica. 



1. A. purpurea Nutt. Perennial; culms erect, about 2 feet high; blades 

 flat or involute, 2 to 5 inches long ; panicles 4 to 6 inches long, rather loose ; 

 branches and pedicels slender, more or less recurved ; glumes unequal, smooth, 

 short-awned, 1-nerved, the first 3 lines long, the second about twice as long; 

 lemma about 6 lines long, purple, strongly scabrous in lines, the apex some- 

 what narrowed, flattened and slightly twisted; awns equal, about l 1 ^ inches 

 long. 



Plains and deserts, southern California to Texas and northern Mexico. 



Locs. San Bernardino, Parish 2123, 3668; Mentone, Leiberg 3295; Jurupa Hills, Wilder 

 1047; The Needles, Jones 64a; Kiverside, Reed 1129; San Jaeinto, Parish Bros. 1549; Fall- 

 brook, Parish 2242. 



Kefs. ARISTIDA PURPUKEA Nutt. Trans. Am. Phil. Soc. 5: 145. 1837. A. aequiramea 



