43 



more or less spreading ; spikelets lanceolate and acuminate when 

 closed, 2 mm, long, generally about equaling the pedicels, which 

 are decidedly thickened at the apex and usually more or less 

 spreading ; empty scales acuminate, purplish, scabrous on the 

 keels, the first longer than the second ; flowering scale about 

 three-fifths as long as the first scale ; palet wanting. 



Collected by A. A. and E. Gertrude Heller, at Forest, Nez 



Perces County, Idaho, on July 16, 1896, at an altitude of 3,500 



feet, no. 3431. A very delicate and beautiful member of the 



genus and perfectly distinct from any species of that region with 



which I am acquainted. 



Danthonia glabra n. sp. 



Whole plant, with the few exceptions noted below, glabrous. 

 Culms 4-7 dm. tall, erect, simple, striate, slightly rough just below 

 the panicle, and puberulent for some distance below the brown 

 nodes ; sheaths smooth, only those at the base of the culm exceed- 

 ing the internodes, the remainder much shorter than their inter- 

 nodes ; ligule densely ciliate with silky hairs 1-2 mm. long; leaves 

 smooth excepting at the apex, 1.5-3 mm. wide, erect, those on the 

 sterile shoots 1.5 dm. long or more, those on the culm 5-10 cm. 

 long, the basal ones shorter than the rest; panicle 5-8 cm. long, 

 its axis, together with the erect or occasionally spreading branches, 

 hispidulous; spikelets, including awns, 1.7-2 cm. long, 5-8-flow- 

 ered, on hispidulous appressed pedicels, 2.5-7 "^"i- long ; empty 

 scales acuminate, the first 3-nerved, 1.3-1.7 cm. long, equalling or 

 slightly shorter than the 5-nerved second; flowering scales 5-6 

 mm. long to base of the teeth, pubescent on the lower half of the 

 margins, and occasionally sparingly so on the mid-nerve near the 

 base, with erect silky hairs about 2 mm. long, teeth including awns 

 1.5-3 mm. long, one of the awns usually shorter than the other, 

 the central awri 9- 12 mm. long, more or less spreading, yellowish 

 brown at the base, strongly hispidulous toward the green apex, 

 about once twisted; palet about reaching to the base of the awn or 

 nearly so, strongly ciliate on the two nerves. 



Type specimens collected by Dr. John K. Small, on Little 



Stone Mountain, DeKalb County, Georgia, on July 5, 1895. In 



this the flowering scales are entirely glabrous on the back. In 



another form from New Jersey the flowering scales are sparingly 



pilose on the back near the base. This latter form was secured 



by Dr. John Torrey, at Quaker Bridge, in May, 1830; also by a 



party of the Torrey Botanical Club at Forked river, on May 30, 



1896. 



