•^'^<» I'OACK.i:, 



l)iir|tlt', lO-lT) cui. loiijir, 1-1. f) cm. broad; niys roii<,'li. perliaps 40 

 at a iiodo, most of tlu'in short ami llowcr-licariii;,' to tlic base. 

 Spikclets aciitt", s('al)roiis, 'i-'.\ iniii. lon;,% tormiiiati'd in addition hy 

 u bristle ol'len 1 mm. ioM<,'; lloral ;,'Iiiine l.T) 1.7 mm. lon^^ awn 

 l)elo\v tlie apex and exten(lin<,f beyond its <,'Iiinie '^-4 mm., <,'liime 

 rather lirm, lirittio truncate, toothed, uiinntely hairy on the; back, 

 ob.seurely ^-nerved below; palea or present. 



()re<f()n, ('alir«»rnia, Nevathi. 



Var. major Vasey, Contrib. V. S. Xat. Herb. 3:72 (1H0;>). 

 Afirnstis r.rtini/d iiiirr()/)//i///(i S. Wats. 



(!ulms :\{) 7') em. hi^di; bhidos hiri^er; panicle 20-;$(» cm. lonj^, more 

 loosely branched, some rays 8 ln^' ion;;. Tho same range as tho 

 sp(!cies. 



9. A. geminata Trin. rnill. 20': (IS-M). 



A tufted erect perennial, 15-40 cm. hi<,di. Ligulo 1 mm. long; 

 l)lades ol" sterile shoots slightly scabrid. mostly involute, 10-'*0 cm. 

 long, 1-'^ mm. wide, tho npper node near the middle of the (!ulm. 

 exclusive of the panicle. J*anicle exserted, purple, narrow or 

 spreading. S-10 cm. long; rays capillary, scabrous, in half-whorls 

 of t-(i, some of the longest (} cm. long, branching al)ove the middle, 

 llower-bearing at and near the ends. Spikelets "i.r)--;5 mm. long, 

 .scabrous on the kec^ls; first glume a little longer, awn usually pro- 

 jecting slightly; lloral glume l.(; mm. long, broad, thin, obtusv\ 

 toothed, r)-nerved below, the awn attached near the middle; palea 

 minute. 



Alaska, Jhrritif/toii in is:'|-"^, Dr. /VrIIo(/(/ 119. 



Plants from liritish Columbia by Macoitu arc awnlcss. 



Alaska to Oregon. 



10. A. densiflora Vasey, Contrib. U. S. Nat. Herb. 3:73 

 (1892). .(. DiKi-roiiat,! Thurb., not Mresl. 



An erect tufted rather stout annual, 7-23 cm. high. Sheaths 

 smooth, crowded at the biise. iather loose, longer than the inter- 

 nodes; lignle dciuirrent. o])tus(s about .'5 mm. long; blades usually 

 Hat, erect, with scaI)rous nnirgins, 3-U cm. long," 3-.'{ mm. wide. 

 I'anicle dense, exserted, (irect, 2-5 cm. long, 15-12 mm. broad, rays 

 .s(!abrous, aj)pressed, ;3-5 in each half-whorl. Spikelets.very pale. 



