PIPER NORTH AMERICAN SPECIES OF FESTUCA. 29 



Wyoming : 



Nash Fork, Xelson 7746. 

 Utah: 



Crazy Womans Creek, WiUiams 2751. 

 Colorado: 



Chicken Creek, Tracy, Earl, cC- Baker 344. 



Routt County, CrandaU 539. 



Yeta Pass, Shear 824. 



South Park, Wolf 295a. 

 Nevada: 



Summit Lake, GriffitJis cO Morri.s 303. 



Pine Forest Mountains, Griffiths cO Morris 215. 



15j. Festuca ovina arizonica (Yasey) Hack. 



Festuca arizonica Yasey, Contr. Nat. Herb. 1: 277. 1893. Type specimen in the 

 National Herbarium, collected by S. M. Tracy near Flagstaff, Arizona (no. 118). 



Festuca ovina arizonica Hack.; Beal, Grasses N. Am. 2: 598. 1896. Reduces the 

 above to subspecific rank. 



Festuca vaseyana Hack.; Beal, op. cit. 601. Type collected at Yeta Pass, Colorado, 

 by Dr. George Yasey in 1884. 



Festuca scahrella vaseyana Hack.; Beal, op. cit. 605. Type from "Colorado (Yeta 

 Pass), Yasey, at an altitude of 9,300 feet." 



The type specimens of the last two were in Professor Scribner's herbarium, accord- 

 ing to Doctor Beal. The National Herbarium specimens show that Doctor Yasey col- 

 lected both arizonica and ingrata at Yeta Pass, but Doctor Beal's descriptions were 

 certainly based on the arizonica specimens in the case of Festuca scahrella vaseyana and 

 probably so in the case of Festuca vaseyana. 



Festuca ovina arizonica occurs in Southern Colorado, Arizona, and New Mexico. A 

 specimen from Oregon, Hoover Creek, Gilliam County [Leiherg 137), seems also refer- 

 able here. 



16. Festuca rigescens (Presl) Kunth. 



DijilacJine rigescens Presl, Reliq. Haenk. 1 : 260. 1830. " Hab. in montanis Peruviae 

 huanoccensibus." Type probably in Presl's herbarium in the University of Prague; 

 a duplicate in Bernhardi's herbarium, now in the possession of the Missouri Botan- 

 ical Gardens. 



Festuca rigescens Kunth, Enum. PI. 1: 403. 1833. Transfers the above to Festuca. 

 The only North American specimen we have seen was collected by S. M. Tracy ''in 

 open pine woods, 4 miles northeast of Flagstaff, Arizona, June, 1887." 



DESCRIPTION. 



Densely tufted, smooth and glabrous up to the inflorescence; culms 2-jointed, hard 

 and polished, rigid, 30 to 50 cm. high; sheaths smooth, shorter than the internodes, 

 the basal ones much broadened and somewhat explanate; ligule nearly obsolete, 

 ciliate; blades involute, cylindric, rigid, erect, smooth, pungent at the apex, 8 to 12 

 cm. long, 1 to 2 mm. in diameter; panicle narrow, erect, 5 to 10 cm. long; rays few, 

 solitary, erect, sparingly branched, angled, nearly sntooth; spikelets rather closely 

 3-flowered, 6 to 7 mm. long; joints of the rachilla cylindric, smooth; glumes thick 

 and firm, the lower l-nerved, acute, 2 mm. long, the upper 3-nerved, a little longer, 

 both scabrous toward the tips; lemma ovate, thick, convex, somewhat carinate toward 

 the acuminate apex, awnless or very short-awned, scabrous near the tip, 4 to 4.5 mm. 

 long, 5-nerved, the lateral nerves disappearing above the middle; palea as long as 

 the lemma, obtuse, the nerves hispidulous. 



