AOHOSTIDK.E. 347 



pedicels; empty jrluiiies nearly ef|iiiil. t'Uiptical-laiieeoliite, rougliish, 

 first l-nerved. secoiul ;J-nerve(l ; llonil yliiiiK' nearly sinootli, oval- 

 liuiceolate, -l-tootlieil or laeerute, 5 nun. lonu. awn attaclied near 

 tlie middle and extending to the tip of its glnme, hairs al)out half 

 the length of the glume, rudiment minute; palea nearly us long as 

 its glume, truncate or obtuse, eiliate at the apex. 



A very robust speeies forming dense tufts on the hillsides. Ac- 

 cording to Dr. Thurber, the lower leaves break oil" near the sheaths, 

 leaving these erect and rigid. The length of the 2 empty glumes 

 is (piitc variable. 



Alaska, r. *S'. T^epf. Ji/n'cKl. 424; Tnalaseka. lf(irn'nf/f(i>i in 

 ls:i-'3, E. Hall (j23; Oregon, IlowelU E. JJall &i:]; California, 

 Bditimler 4. 



Alaska to California. 



17. C. sylvatica var. Americana Vasey, Contrib. U. S. Nat. 

 Herb. 3:83 (iy!»2). 



Perennial; culms erect, 20-00 cm. high. Sheaths rather loose, 

 as long as the internodes, or in tall ])lants. two-thirds as long; ligule 

 truncate, 1-2 mm. long; blades scal)rid, often 'with many dead 

 sheaths below, those of sterile shoots reaching nearly to the panicle 

 or above it, those of the culm rigid, 7-18 cm. long, 3-4 mm. wide, 

 flat or involute, point attenuate. Panicle enclosed at the base or 

 exserted, strict, si)ikelike, dense, sometimes sliglitly interrupted be- 

 low, 8-15 cm. long, 1.5-2 cm. broad, the color ]iale, light to dark 

 puri)le; rays appressed. scabrid, 1-2 cm. long, in clusters of 4-8. 

 Spikelets very variable even in the same panicle or on dilT'i'rent 

 panicles of the same plant, 5-7 mm. long, the twisted and bent awn 

 extending 1-3 mm. above the glumes: empty glumes ovate-lanceo- 

 late, mostly appearing very acute when the margins of the upper 

 ])ortion are involute, scabrous on the keel, first l-nerved, second 3- 

 nerved and a little shorter: floral glume scabrous, ovate, grooved 

 on the back, 4-toothed, 4.5-5 mm. long, awn attached near the 

 base, hairs mostlv in two clusters at the sides, one-third the lensfth 

 of the floret: palea a little shorter, the rudiment about 2 mm. long, 

 with hairs reaching to the tip of the palea. 



"The plant seems to be much more leafy at the coast than 



