k. ■ -J. J- 



PIPKR NORTH AMKKICAN SPECIES OF FESTUCA. 33 



awned; palea about as long as the Icinina, notched at apex, the nervew hispidulouH, 

 the inflexed aides one-third as broad as tbe iideruerve, (Plate X.) 



This species ranges from middle ( alifurnia nt)rth\\ard into Oregon, but only w(^st 

 of the Sierras and Cai^eades. 



Explanation of Plate.— Drawn from HoweU'*^ no. L'fi I'n.m Orogoii and BolandtT's CaUfoniia 

 s|K'cimons. Plant nuturul ai/x; spikelet magnified Ih u Uiik's. 



21a. Festuca aristulata parish! subsp, nov. 



Sheaths and the lower part of the ^tem i'overed with ^hort retrorse pubeseence; 

 leaf blades shortj 10 to 25 cm. long. 



Mill Creek Falls, San Bernardino Mountains, California, eoUeeted by S, B, Pari,sh 

 (no. 5036, type), June 20, 1901, and no. 2490, July 4, 1892. 



22. Festuca thurberi Vasey. 



Feduca thurberi Vasey in Rothrock, Prel. Tiep. Hotany Cent. Colo, 56. 1874. Type 

 in the National Herbarium, eolleeted by Julm Wolf (no, 1154) in South Park, 

 Colorado. 



Poa festacoidcH ^L E. Jones, Pro*-. Cal. Acad. IP 5: 724. 1895. Type from Mount 

 Ellen, Henry Mountain.^, TJtali. A duplicate hi the National Ib^l.arium. 



Poa kaihensiiM. K. Jones, Erythea 4: 8(k 1896. Proposes a new name for the 

 above on account of the older Poa f ('}<(* *roide>i Lam. 



nESCRIPTION. 



Densely tufted with numerous narrow basal leaves; culms erect, hard, scabrous or 

 smooth, <>0to90 cm. high, 8-jointed; sheaths striate, usually scabrous, shorter than the 

 internodes; ligules scarious, often lacerate, 2 to 4 mm. long, decurrent; blades closely 

 involute, narrowly linear, r> to 20 cm. long, acute at apex, usually harshly s<^abrous; 

 panicle 10 to b5 cm. long, loose, slightly drooping; rays solitary, occasionally in twos 

 or threes, scabrous on the angles, sj)reading or aseendhig, commonly pulvillate at 

 base, the longest half to two-thirds as long as the panicle, s])ik(^Iet-bearing only al)ove 

 the middle; spikelets lanceolate, acute, 3 to rvth >w(Ted, 8 to 12 mm. long; joints of 

 the rachilla cylindric, 1 to 1.5 inm. long, scahr us or ncaily smooth; glumes mem- 

 branaceous, smooth or scabrous on the keels, subequal, tlie Pnver 1-nerved, 2 mm. 

 long, acute, the ui^per 3-nerve<l, 2.5 nun. long, obtu.-^ish; lemma eUiptiedanoeolate, 

 faintly 5-nerved, convex, rattier firm in texture, ihiely scabrous near the margins (a* 

 glabrous, cuspidate-acuminate; i)alea nearly equaling the lemma, oblong, obtuse, 

 the nerves scabrous, the inflrxed sides half as broad as the internerve. (Platk XL) 



Colorado, Wyoming, and T^tah. 



Explanation of Platk.— Drann from specimens (^oUectcd by r»ainme] nhovo Beaver Camp, Col- 

 orado, July 3, 18%. Plant one-half natural size; dt'talls enlar^^ed five times. 



23. Festuca elatior P. 



Festuca elatior Jj. Sp. PI. 1: 75. 1753. ''Habitat in P^uropae pratis fertillissimis." 

 Festuca pra tens is Hudson, F\, Angl. 37. 1762. Type locality, Englan<P 

 Festuca poaeoidcs .Michx. Fl. iior. Am. 1; 67. 1803. ''Ilah. ad ripas maritimas 

 lluminis S. Laurentii." A fragnuMit of the type is in tlie Torrey Herbarium. 

 Festuca poaeoidcs a/nericcma Pers. Syn. 1: 94. 1805. Based on the preceding. 

 Festuca americana F. G. Dietr. \^ollst. Lex. Gaertn. 3 : 332. Based on the preceding. 



DESCRIPTION* 



Loosely tufted, often with short creeping rootstocks; culms smooth, 50 to 120 cm. 

 high, smooth and glabrous, 3 or 4-jointcd, erect or geniculate only at the very base; 

 sheaths shorter than the internodes; ligule nearly obsolete; blades 10 to GO cm. long, 



