A(il{()STII)K.K. '.i2'.i 



empty plumes, ri-norvcd, sciibroii.s, with few minute l)iiirs. very 

 acute, tertuiiiutiug in 'Z setie, iiwn oiu'-liftli Itclow tiie tips uinl pio- 

 jectiu",' 5-0 luin.: piileu or miiiuti'. Not seen by me. 



Ciilironiiii, liiilamlfr. 



;). A. Howellii S<iil)u. Vasey, Coiitril). U. S. Nut. Herb. ;J:7(; 

 (1802). 



I'erennii;!; culms weak, ji^eiiieulate, 40-00 cm. lii^Mi. Sheallis 

 smooth, about 4 in number, near'y as lon^' as the intornodes; 

 li<jule 4-0 mnj. Ion*;, bhules Hat, slightly scabrid, '^O-IiO cm. long, 

 4-5 mm. wide. I'anide greenisli white, exserted, dilTuse. flexuose, 

 18-20 cm. long, the lower rays in distant hali'-whorls of 5-7, the 

 upper ones in pairs, capillary, brandling at and above the mid- 

 dle, some of them 8 cm. long, flower-bearing near the tips. Spike- 

 lets 3-4 mm. long, scabrous on the kei'ls, llrst glume .'5.5 mm. 

 long, a little longer than the second; lloral glume 2.5-;2.S mm. 

 long, laeerate-tootbed, 4-nerved above, the awn attached bi'low tiie 

 niiddle, bent, not llexuose, exceeding its glume by ii-4 mm., hairs 

 0.5-O.T mm. long; ])alea 0. 



Oregon, Ifawr/1 108. In 1882, distributed as J. Sconlcrii Trin. 



Alaska to Californi'i. 



4. A. virescens II. R K. Xov. Gen. et Sp. 1: 135 (1S15). 



A stout erect ))erennial, IJ()-80cm. high. Sheaths nearly smooth, 

 the secoiul from the top half as long as the internodes; ligule trun- 

 cate, about 4 mm. long: blades erect, flat, scabrid, 12-16 cm. long, 

 5-9 mm. wide. Panicle exserted, i)ale green or brownish, tinged 

 with purple, 15-18 cm. long, IJ-4 cm. broad, the rays in clusters 

 of 5-15, distant about 3 cm., the short ones flower-bearing nearly to 

 the base, the longest flower-bearing from about the middle. Spike- 

 lets with empty glumes very acute, scabrid throughout; first glume 

 3.5 mm. long besides a bristle 1 mm. long, second 3 mm. long 

 besides a short bristle; floral glume over 2 mm. long, with a few 

 very short hairs at the base, very broad, truncate, 5-nerved below, 

 the lateral nerves terminating in minute bristles, the awn rather 

 stout, attached near the middle, projwting 4 mm. ; palea 0. 



Tlie plants seen belong to Scribner and were collected by liolan- 

 der and ticketed ''A. rin'dis, fide Muuro. A.jmllida fideThurber.'* 



