Fi:sri( K.K Alii 



pinootli, longer than tl)o inttTiiodcx, tlio hiowii niurgina at the 



tliroiit iwoliitc; lif^ulf I nun. loiii,'; blailcs 



liiiL'ur to ovuti'-luiict'oliitc, •,'()-;{(> cm. long, with 



10-15 norv«!8 nioh a'nlv the initlrih. I'aniclo 



])yi'iiini(hil, about 20 em. h)n<,'. lower raysternato 



and remote, more iiumerou> above, the luii^fest 



10 cm. lon<,', beariug 10-1.") spikelet.s from base 



to apex. Sj)ikelet8 linear or ovute-laneeolate, 



S-l» mm. Ion;,'; I'mpty ^dumes 7-nerve(l, first 3 



mm. lon^', 3 mm. wide, se(;ond narrower and a pia. 103. — Zeugites 



little lon<'er; lloral ^dume of female floret tumid, ("f'>^'«- '^' fl'i'<'-- 

 =" ' '^ ' let ; a, lloitt. 



4-5 mm. long, 11-nerved; palea obovate, 4 mm. (Scribiier.) 

 long, (iiliolutc on the keels; lloral glume of male florets broadly 

 ovate, subacute. I'.a mm. long, T-nerved. with a few eross-uerves 

 near the apex; its i)alea oval, 3 mm. long. Antliers 2.2 nun. long. 



Mexico, Priuiik 20-t(), 2322. 



2. Z. Mexicana (Kunth) Trin. Steud. Nom. Va\. 2. 2 : 798 

 (1841). Dcspretzia Mexicana Kunth, Kev. Gram. 2 : 485 (1820). 



Culms slender, branching, 20-50 cm. high, from creeping root- 

 stocks. Sheaths shorter than the intoruodes, smooth ; ligule 1.5-2 

 mm. long; petiole distinct, 4-10 mm. long, puberulent next the 

 blade; blades ovate, acute, -5 cm. long. Panicle thin, ovoid, 4- 

 G cm. long, lower rays in twos, threes, or single, bearing each 1-0 

 spikelets. Spikclets glabrous, 3-flowered, 4-1 mm. long; em])ty 

 glumes equal, 3 nim. long, 5-uerved, truncate, 5-toothed; floral 

 glume oval, about 5 mm. long, mauy-nerved; palca longer and nar- 

 rower than its glume. 



Mexico (San Luis I'otosi), Pn'tu/le 3919. Kich woods. 



118. (244). PleuROPOGON K. lir. Parry, First Voy. Suppl. 280. 

 (err. typ. 180) (1824). /*. Lophochlwna Xees, Ann. Nat. Hist. 0) 

 1: 283 (1838). 



Spikelets 8-14-flowercid, secund, racemose, on a simple raciiis^ 

 rachilla articulate above the empty glumes and between the florets. 

 Empty glumes membranous, subhyaliue, 1 -nerved or the second with 

 an obscure nerve on each side the central one, awnless, unequal ; 

 floral glume longer, membranous, rather firm, 5-T-nerved, apex 



