/578 I'OACH/K. 



ing rnotHtock. Hlodos of storile ghootri Hut or coiuliiplicato, scu- 

 brous ahovo, lioldiiij^ tlioir width to iirur the piiiigont upcx. IO-;i() 

 cm. long, 3-4 iiiiii. wide, those of thu oulni 'i-'-i in iniinbcr, 5-10 

 cm. long; ligulu 2-4 mm. long. I'linido thin, open, ovuti^hincoo- 

 luto or linear when in fruit, 12-20 cm. long, riiva Hcuhi-ouH, Hlcnder 

 or rather stont, tin- middio ones in tlireoM, fours, or lives, tho long- 

 ost 4-«t cm. long, llower-hearing o.i the iijjper third or half. Spike- 

 lets oval or ovute-Ianceolate, ll-.'i-flowered, 5-7 mm. long; empty 

 glumes sul)u(|iuil, thin, seuhrid, i-T) mm. long, li-ncrved, linear- 

 lanceolate, each nearly covering the Moral glume above it; iloral 

 gli'.rnt! 4-5 mm. long, scarious or pul»orulous, ovato or oval, acute 

 or obtuse, u few short hairs near the base; palea4 mm. long, linear, 

 scabrid on the keels, 2-toothed. It shades ol! into J. KemdfHsis 

 and -1. Fendhrinna, 



Colorado, Vnseii i)T\'.\, Let term an 13, 15, 54, etc. ; Montana, Scrih- 

 iicr, Williams 5i:S, A ndrrsou 41; Nevada, Trary; Washington. 



\'ar. rigida. Leaves of .sterile shoots numerous, rigid, 20-40 

 cm. long. 



Utah, Jon ex. 



Distributed as P. tninifoUa. 



11. A. Pringleii (Scribn.). Pixt Pri nf/Iei i ficr'ihn. Bull. Torr. 

 Club, 10:31 (1883). Pou Palkrsoni Vasey, Contrib. V. S. Nat. 

 Herb. 1:275 (189.3). 



A densely tufted strict glalirous perennial, 15-20 cm. liigli, from 

 creei)ing rootstocks. Sterile shoots numerous, the blades 3-5 cm. 

 hmg, conduplicato, curved, smooth, 7-10 mm. diam., the apex ob- 

 tuse; leaves of the culm 1, starting below the middle of the culm; 

 ligule 2-3,5 mm. long; blades 5-12 mm. long, apex pungent or 

 obtuse. Panicle linear, strict, 2-3 cm. long, bearing few spikelots. 

 Spikelets brown and purplish, 5-7 mm. long, 3-5-flowered, linear- 

 lanceolate; empty glumes broadly lanceolate, about 5 mm. long, 

 3-nerved below, margins scarious, broad, subequal; floral glume 

 elliptical-lanceolate, 5-5.5 mm. long, minutely punctulate-Bcabrous 

 throughout; palea one-fourth shorter than its glume, 2-toothcd, 

 ciliate on the keels. Spikelets variable, of a membranous or char- 



