MANUAL OF THE GRASSES OF THE UNITED STATES 



73 



27. Festuca dasyclada Hack. (Fig. 94.) Culms 20 to 40 cm tall; 

 blades folded, about 2 mm wide when spread, those oi the culm 4 to 



6 cm long, those of the innovations 10 to 15 cm long; panicle open, 



7 to 12 cm long, the branches rather 

 stiffly and divaricately spreading, 

 softly pubescent ; angles ciliate ; spike- 

 lets pale, long-pediceled, 2-flowered; 



flumes lanceolate, acuminate, the 

 rst about 4 mm, the second about 

 6 mm long; lemmas rather thin, some- 

 what keeled, rather strongly nerved, 

 scaberulous, about 6 mm long; awn 

 about 2 mm long, from between 2 

 minute teeth. 91 Rocky slopes, 

 rare, Utah. 



FESTUCA RIGESCENS (Presl) Kunth- 

 Densely tufted, about 30 cm tall; blades 

 firm, involute, sharp-pointed; panicle nar- 

 row, few-flowered, 5 to 10 cm long; spike- 

 lets about 3-flowered, 6 to 7 mm long; lem- 

 mas ovate, thick, convex, awnless or mucro- FIGURE 94. Festuca 

 nate, 4 to 4.5 mm long. <2l There is a glumes and floret 

 single specimen of this species in the United 

 States National Herbarium, labeled "Arizona, Tracy?" On the sheet is a note 

 made by Professor Piper (Feb. 12, 1904) quoting Tracy, "In open pine woods 



4 miles southeast of Flagstaff, about June 20, 

 1887." This agrees exactly with specimens of this 

 species from Peru, w r hence originally described. 

 Since the species is not known north of Peru, ex- 

 cept from this specimen, it seems probable that the 

 label has been misplaced. 



28. Festuca viridula Vasey. GREEN- 

 LEAF FESCUE. (Fig. 95.) Culms rather 

 loosely tufted, erect, 50 to 100 cm tall; 

 blades soft, erect, those of the culm flat or 

 loosely involute, those of the innovations 

 slender, hi volute; panicle open, 10 to 15 cm 

 long, the branches mostly in pairs, ascend- 

 ing or spreading, slender, somewhat re- 



to 



Panicle, X Yx. 

 (Dupl. type.) 



x y 2 ; floret, x 5. 



Panicle, 



(Casick 2431, nowered; glumes lanceolate, somewhat un- 



equal, 5 to 7 mm long; lemmas membra- 

 naceous, acute or cuspidate, glabrous, 6 to 8 mm long. 9t Moun- 

 tain meadows and open slopes, 1,000 to 2,000 

 m, British Columbia to Alberta, south to cen- 

 tral California and Idaho (fig. 96). An im- 

 portant forage grass in the mountains of the 

 Northwestern States. Festuca howellii Hack., 

 differing from F. viridula in having more sca- 

 brous lemmas and awns 2 mm long, does 

 not seem sufficiently distinct to be recognized 



as a species. 91 Known from a single collection (Josephine 

 County, Oreg.). 



FIGURE 96. Distribution of 

 Festuca viridula. 



