4SS 



rachis flat, spkt 2 mm Ig; empty gm 

 hispid on keel, nar, 1st sn'er than 2d, 

 about 2-3ds as lg as the broad and 

 strongly compressed 3d one. 



S D! Cosmopolitan. 

 Genus LEFTOCHIiOA Beauv. 



Mostly rather tall ann grasses with 

 flat Ivs and num spk forming a simple 

 panicle: spkt 2-many-fid, flattened, alt 

 in 2 rows on 1 side of rachis: gm 4- 

 many, the 2 lower empty, keeled, 3- 

 nerved: palea 2-nerved: sta 3: sty dis- 

 tinct: grain free, enclosed in scale and 



LEPTOCHOLOA FASCICULARIS Gray. 



Ft. Yuma, Cal to New England. 

 I.EFTOCHLOA MUCBONATA Kunth. 



Cu 3-9 dm hi, erect, branched, 

 smooth; sheaths sh'er than internodes, 

 smooth; ligule sh, lacerate-toothed: Ivs 

 5-18 cm Ig, 2-6 mm wide, scabrous; spk 

 num, slender, rigid, ascending or some- 

 times spreading, lower 5-15 cm Ig: spkt 

 com 3-fld, about 2 mm Ig; empty gm 

 sh'er than spkt, acute. 1-nerved, slight- 

 ly scabrous on keel; flg gm 2-toothed at 

 apex, ciliate on nerves. 



Ab 42. "Com in San Joaauin valley 

 and at Imperial along irrigating canals. 

 Monica (Davidson)." 

 Tribe FESTUCEAE Fescue tribe. 



Spkt 2-many-fld, com hermaphrodite, 

 pedicellate in racemes or panicles, the 

 latter sometimes dense and sok-like: flg 

 gms com larger than empty gms, awn- 

 less or with 1-several straight, rarely 

 bent, awns, which are either terminal 

 or borne just below the apex. 



Spkt of 2 kinds in same infl, herma- 

 phrodite and sterile. 



A. Fertile spkt 2-3 fld, awnless. Cynos- 

 urus. 



B. Fertile spkt l-fld, Ig awned. Lam- 

 arc kia. 



Spkt all alike in same infl. 



A. Plants dioe, saline or martime. 



1. Spkt solitary, concealed in axils of 

 crowded sh and rigid Ivs. Monantho- 

 chloe. 



2. Spkt in exserted spk-like panicles. 

 Distichlis. 



B. Plants not dioe. 



1. Flg gm 1-3-nerved or nerveless. 



a. Ann infl a lax panicle. Eragrostis. 



b. Per; infl a spk-like panicle. Koeleria. 



2. Flg gm 5-many-nerved. 



a. Flg gm rounded on back. 



Nerves of flg gm prominent. Melica. 

 Nerves of the flg gm obscure or mani- 

 fest only near apex. 



Flg gm obtuse and awnless. Poa. 



Flg gm acute, oft awned. 



Flg gm entire, acute or awned from 

 apex. Festuca. 



Flg gm com awned just below the en- 

 tire or 2-toothed apex. Bromus. 



b. Flg gm compressed or keeled. 



Spk nearly sessile in dense 1-sided 

 clusters at ends of the few panicled 

 branches. Dactylis. 



Spkt 1-2 cm Ig; gm sh-awned. Bromus. 



Spkt sm'er; gm awnless. Poa. 



Genoa L.AMARCKIA Moench. 

 LAMARKIA AUREA Moench. 



Ann; cu tufted, 2-5 dm high; sheaths 



434 



smooth; blades 5-8 mm wide; panicle 

 linear or oval, 5-8 cm Ig; empty gm of 

 fertile spkt nar, keeled, 4-4.5 mm l&I % 

 gm 3 mm Ig, oval, bearing a dorsal awn 

 a little below apex, 6-9 mm Ig. Eu. 



S D Co (Palmer); C D; Baja; Texas. 

 MONATHOCHLOE LJTTORALJS E. 



Cu firm, creeping or ascending; Ivs 

 crowded, subulate, com about i cm lg^ 

 conduplicate; flg gm 9~i2-nerved. Da 2C/ 

 Ab 44. SD salt marshes! 



S D (Or 512); Magdalena Isl. (Br). 



Genus DISTICHLIS Rafineaq. 

 D. MABXTIHA Raf, J Phys 89:104 

 (1819). Da 19. Bloch, Er 2:163 (med- 

 icinal use). 



Chollas (Or 504); Baja mts (Or 1161). 



Uniola spicata L. 



Distichlis spicata Greene, Cal ac b 1:415. 



D. SFICATA Greene, Cal ac b 2:415. Ha 

 57. Ab 47. 



Cu rather stout, from creeping scaly 

 rt-stock, rigid, erect, 1-5 dm hi; sheaths 

 num, glab, bearded at throat; blades 

 pale g, 3-10 cm Ig, 3 mm wide at base, 

 spreading, rigid, margins minutely qil- 

 iate; panicle spk-like, 3-8 cm Ig, its 

 branches appressed; spkt 8-12 mm Ig, 

 keeled,| empty gm obtuse, 1st 2-3 mm 

 ]g. 2d 4 mm Ig; flg gm of sterile spkt 

 3-5 mm Ig, of fertile spkt 5-6 mm Ig. 

 Salt grass. 



E. AX.BA J&C Presl, Rel Haenk 1:279. 

 B 2:315. 



ERAGROSTIS CURTIPEDICELLATA 



Bk. 



Ft. Yuma, Cal. (Or 2078). 

 E. FENDX.EBXANA Steud, Syst PI Gram 

 278. Mex. B 2:309. 

 ERAGROSTIS MAJOR Host. 

 Da 19, Er 1:101, LA Co. Ab 45. 



Cu 2-6 dm hi, erect or decumbent at 

 base, com branched, smooth: sheaths 

 sh'er than interrnodes, sparingly pilose 

 at throat, otherwise smooth; blades 5-15 

 cm Ig, 2-6 mm wide, flat, smooth be- 

 neath, scabrous above; panicle 5-15 cm 

 Ig, the branches spreading or ascending, 

 2-4 cm Ig; spkt 8-35-fld, 5-15 mm Ig, 

 about 3 mm wide, flat; empty gm obtuse, 

 2-2.5 mm Ig, lateral nerves prominent. 



Rosalia (Orcutt). 



E. MEGASTACHYA Link, Hort Berol 

 1:187. B 2:315 as major. 

 B 2:315. Da 19. 

 ERAGRSTIS NEOMEXICANA Vasey. 



Prescott, Arizona (Tourney). 

 BRAGROSTIS OXYLEPIS Torr. 



S D! Texas, Kansas. 

 ERAGROSTIS PILOSA Beauv, Agr 71. 

 Da, Er 1:101, LA Co. Ab 45. Z 1:184. 

 Parry, Wyo, 16. Da 19. Ab 45. 



Ann, 4-5 dm hi, somewhat tufted, 

 smooth; sheaths smooth, sh'er than in- 

 ternodes; Ivs flat, 8-15 cm Ig, smooth; 

 panicle spreading, 15-30 cm Ig; rays de- 

 compound, smooth or slightly beared in 

 axils; spkt on pedicels 4-8 mm Ig, nar'ly 

 linear, 5-8 mm Ig, 7-20-fld, dark lead 

 color or p'lish; empty gm lanceolate, 1st 

 1.5 mm Ig, 2d 2 mm Ig, fig gm ovate, 

 1.5-1.8 mm Ig; palea about equaling its 



