334 POACE.E. 



uiul with much shorter und erect brunches, ami a flrmer culm." 

 Viisey. 



Oregon, IIoivcll in 1881; Wushingtoii, Sni'siforf. 



24. A. attenuata Vasey. Coult. Hot. (Jiiz. ll:;}:5r (1S80). 



Perennial; cuhns sniootii, slender. (»()-90 cm. high. Slieatlis 

 smooth, shorter than the iuternodes; ligule 3-5 mm. long; blades 

 scabrous, about L' mm. wide, tlie lower ones 5-10 cm. long, those 

 above, 3 in number, 8-18 cm. long. I'anicle sometimes exserted, 

 25 cm. long, pyramidal or nai'rower, tbin, lO-'.'O cm. long; rays 

 capillary, rough, bearing few spikelets above the middle, the lowest 

 ones on long peilicels 10-13 cm. long, and 10-15 in a cluster, on 

 smaller panicles in threes, fives, or sevens. Spikelets purplish, 2.5-;{ 

 mm. long, oblong-lanceolate, scabrous on the keels, first glume a 

 little longer than the secoiul, both 1-nerved; floral glume broadly 

 oval, obtuse, 5-nerved, 1.5-3.3 mm. long, a few very short hairs on 

 the callus at the base, uuawned; palea 0. Very variable as received 

 from collectors. 



Washington, Ifoiderson 1(511, collected near the ocean in moist 

 fields; Oregon, JloivcUy springy places along the Applegate, also 

 near Mt. Hood. 



35. A. altissima (Walt.) Tuckerm. Am. Journ. Sci, 45:44 

 (1843). Coniiiropitp alfissinntn Walt. Fl. Car. 74 (1788). Trichudiitm 

 elatum. Pursh, Fl. Am. Sept. 1:01 (1814). 



Perennial; culms erect, stout, 00-90 cm. high. Sheaths 

 scarcely smooth, mostly longer than the iuternodes; the upper lig- 

 ule acute, 5-0 mm. long; blades of sterile shoots narrow and mostly 

 involute, the upper flat, scabrous, 10-15 cm. long, 3-0 mm, wide. 

 Panicle exserted. spreading, green or purple, 15-35 cm. long, rays 

 scabrous in rather remote clusters of 5-10 below, branching above 

 the middle, flower-bearing in dense clusters along the upper third 

 of the branches. Spikelets crowded, 3.5-3 mm. long: empty glumes 

 acuminate, scabrous on the keels, first a little tlie longer; floral 

 glume rather firm, broad, awuless, a little shorter than the second 

 empty glume ; palea 0. 



New Jersey, Scribner iovV. S. Dept. Agricul. 31)0; Mississi])pi, 

 Trncy; California, Bulande r (j103. 



