iiuuDK.K. o:w 



floriil gliimo, koolH oftoi\ ciliatc. Stum(»ii8 .'I. SlyltH very Hliort, 

 (listinot. (Jriiin imrrowly oldoiig, roin|»r('HHo<l from llio Imck. oftcji 

 coiK'uvo oil tliu inside, iiion,' or less hairy ut tlio apex, wlicn <lry 

 jullit'rinjj to tlio pah'U or frue. 



IN'rcniiials or aiimialM, with Itial'-hhulcs Hat or roiivohitc Spiko 

 terminal, usually stilT, spikch'ts hirgf. JSpecit'S )H)-'M\ b('ionj,'iiig to 

 temj)('rato ro|i;l(»ns of America an<l l-iiirope. 



Meiitham propuaetl sections as follows: 



1. Jf/ropi/ron jiroper, mostly ju'rcnnials. spikelots more or less 

 distant a]on<r the common ra(;his, outer ^dumes usually uiu>riual- 

 sided and not keeled. 



2. J'Jn'»i(>pi/niin Lcdel*. — mostly anniuils. spikelets disticlious 

 anil close to^'etlier in a short dense spike, the narrow empty glumes 

 nearly e(|ual-si(led an<l keeled. 



A. Spike 1 -sided 1 



B. Spike not 1 -sided (a) 



a. Florets soft, woolly 3 



a. Florets not woolly (1>) 



I). Kootstooks numerous, plant not glaucous, ... 3 



b. Ifootstocks present, jtlant glaucous 4- 



b. No rootstocks (c) 



c. Awns slender, recurved 5-6 



c. Spike long, Hexuose, nerves of empty glumes 



conspicuous 7 



c. fjiko No. T, oidy with short erect spikes. . .8,1) 

 1. A. violacescens (If. I'ound). -/. rauinum (forma) riolarcsreus 

 R. Pound. Minn. Hot. Studies, liull. f» (III) lor (lSf»4). A. imi- 

 laterale Cassidy, I?ull. Col. Agr. Fxp. Sta. 12: O;} (1800). A. rani- 

 num loiihtferale Vasey, Contrib. U. S. Nat. Herb, 1 : 2711 (I SI);;). 

 A. nnildfenilo lieuuv. is a synonym of Feufncd Icndijlora Sclirad. 



A i)erennial, OO-SO cm. high; culms strict, smooth. Leaves 

 !>-4 in num])er, sheaths shorter than the internodes; ligule very 

 short; blades r();igh, involute, ])ungcnt-pointed, 5-7 cm. l<»ng, 5-12 

 mm. wide. Spike cxserted, 1-sided, 7-10 cm. long, 5-S mm. wide, 

 often purple; internodes of rachis at the middle 3-4 mm. long. 

 Spikelets 3-4-tlowered, regularly breaking in pieces, first glume 9 



