MANUAL OF THE GRASSES OF THE UNITED STATES 



71 





Figure 87. — Distribution of 

 Festuca shortii. 



Figure 86.— Festuca shortii 

 Panicle, X Vi, floret, X 5. 

 (Palmer 34672, Mo.) 



thickets, Pennsylvania and South Carolina to Iowa and eastern 

 Texas (fig. 87.) 



23. Festuca thurberi Vasey. Thurber fescue. (Fig. 88.) Culms 

 densely tufted, rather stout, erect, 60 to 90 cm tall; ligule 2 to 4 mm 

 long; blades involute, scabrous, firm, erect; 

 panicle 10 to 15 cm long, the branches usually 

 solitary, somewhat remote, ascending or spreading, 

 naked below; spikelets 3- to 6-flowered; glumes 



rather broad, about 4 

 and 5 mm long; lemmas 

 rather firm, faintly 

 nerved, glabrous or 

 nearly so, acute or cus- 

 pidate, 7 to 8 mm long. 

 91 — Dry slopes and 

 rocky hills, 2,500 to 

 3,500 m, Wyoming to 

 New Mexico and Utah (fig. 89). 



24. Festuca ligulata Swallen. (Fig. 90.) Culms slender, loosely 

 tufted, erect from a decumbent often rhizomatous base, scabrous 



below the panicle ; sheaths glabrous ; blades 

 6 to 20 cm long, those of the innovations 

 as much as 30 cm long, flat and 1 to 2 mm 

 wide or mostly involute, scabrous, rather 

 firm; ligule 3 to 3.5 mm long; panicle 6 to 

 10 cm long, the 1 or 2 scabrous branches 

 stiffly ascending or spreading, few-flowered, 

 naked below; spikelets 6 mm long, 2- to 

 3-flowered, the pedicels (mostly shorter 

 than the spikelets) appressed ; glumes acute 

 or acutish, scabrous, the first 3 mm long, 

 1-nerved, the second 4 mm long, 3-nerved; 

 lemmas 4 to 5 mm long, acutish, scabrous, 

 obscurely nerved, awnless, thepalea slightly 

 exceeding it. 91 

 — M oist shady 

 slopes, Guadalupe 

 and Chisos Moun- 

 tains, Tex. 



25. Festuca scab- 

 rella Torr. Rough 

 fescue. (Fig. 91.) 

 C ulms densely 

 tufted, erect, 30 to 90 cm tall; ligule very short; blades firm, erect, 

 scabrous, involute, or those of the culm sometimes flat but narrow; 

 panicle narrow^, 5 to 15 cm long, the branches solitary or in pairs, the 

 lowermost sometimes in threes, appressed or ascending, naked below; 

 spikelets 4- to 6-flowered; glumes somewhat unequal, lanceolate, 7 to 

 9 mm long; lemmas firm, rather strongly nerved, scaberulous, acute 

 to cuspidate or short-awTied, 7 to 10 mm long. % (F, hallii 



Figure 88.— Festuca thurberi. 

 Panicle, X X A\ spikelet, X 5. 

 (Pammel, Colo.) 



Figure 89.— Distribution of 

 Festuca thurberi. 



