(i55) 



nerve on each side near the base, broader than and a little 

 exceeding the 3-nerved second ; flowering scale strongly his- 

 pidulous, 4-5 mm. long, 5-nerved, the nerves usually excur- 

 rent in short awns, the dorsal awn inserted about one-quarter 

 way from the base of the scale, its column yellowish brown, 

 closely spiral and about reaching the apex of the scale where 

 it is strongly bent, the divergent portion much exserted and 

 5-6 mm. long ; palet a little shorter than the scale, irregu- 

 larly and finely toothed at the apex, 2-nerved, the nerves 

 sometimes barely excurrent ; callus with a tuft of hairs on 

 each side about 0.5 mm. long, the dorsal portion naked: 

 rudiment |- to |- as long as the scale, pubescent with erect 

 hairs 1 mm. or a little less long, sometimes bearing an awn. 



Type collected by R. S. Williams in dry soil in open 

 places at Dawson. There is also a specimen in the herba- 

 rium of Columbia University collected by Kennicott on the 

 Yukon River, but with no other data. Related to C. Tzvccdyi 

 Scribn., but its more slender culms and narrower more open 

 panicle, long and narrow leaf-blades with the upper surface 

 pubescent, and the smaller spikelets readily separate it. 



Calamagrostis purfiurascens R. Br. ? An unusual loose- 

 panicled form with large anthers, fully 3 mm. long. It may 

 be undescribed. Five-finger Rapids (Tarleton). 



Deschamfsia atrofiurjyurea (Wahl.) Scheele. White Pass, 

 August 26, 1899 (Williams). The branches of the panicle 

 are exceedingly long, much longer than in the typical form, 

 the lower ones being 10-12 cm. long, spikelet-bearing only 

 at the summit, and drooping. The spikelets, however, are 

 identical with those of the common form. 



Deschampsia caesptosa (L.)Beauv. Dawson (Williams). 



Deschampsia calycina Presl. Dawson (Williams). Re- 

 garded by the collector as introduced. 



Trisetum Alaskanum Nash, sp. nov. 



A tufted pubescent perennial with the innovations about 

 one-half as long as the culms. Culms 2-4 dm. tall, stout, 

 ascending, densely villous with reflexed hairs : leaves 2 ; 

 sheaths loose, pubescent with soft reflexed hairs ; ligule 

 scarious, about 1 mm. long; blades lax, pubescent with soft 

 spreading hairs, those on the culm 8-10 cm. long, 3-4 mm. 



