A(H{(»s'i'ii)i:.i':. ani 



ciilrii 10-1)0 cm. lon;j, 5 mm. wide. Paiiii'lc oroot, ititorniptod, 

 l'-i-l."t cm. loii;,', '.'-.'J cm. limiul ; niys mimcroiis in dense dusters, 

 )l-'.\ cm. distant. Spikcluts cro\vde(| from the iipex to near the base 

 of the hranclies, naiTow, smt)()th, acntc, ahout 4 mm. h)n.ir: OMi|ity 

 ^'Inmes snhefjual, oval-hinecohite, 4 mm. lon^', lirst l-nerved, second 

 u little till! shorter, ;)-ncrved; hairs thin, uhoul lialf as-lon;; as tlie 

 llort't, the hairy rudiment about d'-i mm. lun;^: lloral <rlume tlnn, 

 bilid, as wide as tiie empty glumes, al)Out 15. mm. Ioiilt, awn 

 straight, inserted a little below the middle ami but little longer 

 than its glume; palea hyaline, 



r. S. Dept. Agricul. 1I5!» from Cmtirk, collected on Eaglo 

 Creek. Eastern (Mvgon on mountains at the altitude of 5000 feet. 



Washington and Oregon. 



'^4. C. Canadensis (Mich X.) Meauv. Agrost. !:>; (isr.»). \\\.\v.- 

 .FoiNT. AniiHli) ('(niit</ni.sis ilichx. Fl. iior. Am. 1:7:! (IS((;»). 

 Annn/ii inp'ostoldes I'ursh. Fl. Am. 80 (lSl4j. (J. Me,rinii((i Nutt. 

 Gen. 1:4(; (iSlS). 



A perennial with creeping rootstocks. ("ultns erect, snidotli, 

 usually bearing sterile branches near the middle or above. !I0-1.')() 

 cm. high. Sheaths close, but little shorter than the iiiternodes; 

 ligule lacerate. 4 mm. long; blades glaucous, flat, scabrid, \i)-\)0 

 cm. long, 0- S mm. wide, tapering toward the base, apex attenuate. 

 Panicle exserted, loose, ojien, oblong, mostly tinged with purple, 

 l0-'>0 cm. long'; axis and rays mostly scal)rous, some branches 

 flower-bearing above the middle only, others for the whole length. 

 Spikelets scal)rid. open in llower and in fruit, 2,r)-3..') mm. long; 

 empty glumes ovate-lanceolate, lirst l-nerved, second ]-;}-nerved; 

 floral glume *^-3 mm. long, ovate, acute, bifid, bt'aring a very 

 slender straight awii attached near the middle, reaching the tij) of 

 its glume or shorter or longer, the hairs from two thirds us long as 

 the floret to a little exceeding it; rudiment minute. 



Vermont, Pniif/Jc ; New York, Thurhcr ; Massachusetts, /^er?/ 

 70; Michigan, Ow/t'//, Chirh 701, 32;5r>; Farmll, /Mil 77, 78; Illi- 

 nois, IjcxI ; Minnesota, /itiifci/ H 10, H 250, H 529, Sandberg 30. 

 013, 795; Colorado, ('((ssi>h/; Wyoming, najfuni C 80. C 91; Utah, 

 Jones 1274; Washington, Sxi-sdorf 1023, 2127 ; Oregon, Howell. 



