AOIJOS'I'IDK.K. 210 



Peiiiisvlviiniii, Scrihiirr '-.MWJ; Dcliiwiirc. ('(in/ii/: also Lake Co., 

 MicliiiTini. , 



Nt'W l')nj^laii(l, Miclii<j;aii. Wisconsin, and soutliwanl. 



U.S. flexuosa Vascy, Hull. 'I'orr. Club, 15:4!» (IS.SS). 



Culms crei'l. scaln'itl. ?(»-!»(> cm. hi^li. IShcallis lon^'cr than tlio 

 intc;rn(Ml('s; lower li<,MiU^ 1 mm. lon;,% the ujipcr .5 mm. loiii;; Madcs 

 (»r sterile shoots about half as loiij^ as the culm, those on the culm 

 :> in numher, the upiier lO-lS cm. Ion;;. Panicle exserted when 

 nuiture. thin, l;.'-5i") <'m. lon<,'; rays in threes, fours, or lives, 

 sprcadini;. the lower clusters T-',> cm. distant from the next above, 

 loni^'est. rays 10 cm. \o\\;j:, lie;irin<,' a few sjtikelets near the apex. 

 Kmpty .triumes [)urplish. linear-lan(!eoIate, :{-norvcd at the base, 

 lirst ll-i;{ mm. Ion;,' with a very slender apex, secoiul 7-10 mm. 

 lonu:; tloret pul)escent. (i-T mm. lon<r. including; the curvt'd acute 

 callus below, and a short crown of hairs at the apex; awn once 

 bent, about (;m. lon^°: palea 'i mm. lon;^. 



Mexico. Priiifili' '.WA. 



V>. S. coronataThurl). S. Wats. Hot. Calif. '^:r>sr (IHSO). .s'. 

 SIHIiiKiiniii Holand. I'roc. Calif. Acad. 4: Hi!) (IHTO). 



An erect j^rass. l'.'(»-|SO cm. hi,<;h. the culm (»fien Ti-S cm. 

 diaiti. Sheaths v(M'y loose; li^j^ule very short and a ciliatc frin<;e; 

 blades about 1 in nund)cr. scabrid abov<f and si>metimes below, the 

 lower often !)() em. loufj, S-T* juni. wide, from tlu^ base ixradually 

 taperiuf^ into a very slender involute j)oint, the upper one lilil'orm. 

 If) cm. lonjf. I'aiiicli! often partially included by the inllated 

 upper sheath, narrow, many-llowercd, :50-|o cm. IcMiir. lower 

 branches in twos or threes, sonu' of tluMu often l,") cm. lon^. 

 Empty jflumes pale ^reen, tinired with |)urple. acuminate an<l 

 bristle-pointed, lirst o-rt-nerved. l<I-'^2 mm. lon;.r. se(!ond r)-iu'rvc(| 

 and VI- W mu). Ion;;; lloret to the joint, includini; the short sharp 

 curved callus, !»-10 mm. lony, clothed with silky hairs. \\w ujiper 

 of which are 4 nun. Ion;;; apex bilid. hairy, awn slender, twice 

 bent near the middle, about ^.T) cm. long; i)alea 4-5 mm. long. 

 Stamens .'}; anthers nakcil. 



S. SlillmtuiHii Holauder is a snuill form of this species. 



