FESTUCE.E. 531 



Agricul. 632; Michigan, FarweJl, Beal 120, Cooley; Utah, Jones 

 lUo9; Arizona, Tracy; Oregon, Hoioell ; California, ^'o;;eA\ 

 Introduced from Europe. 



2. P. infirma II. et K. Xov. Gen. et Sp. 1:158 (1815). /'. 

 anmia Q>hQ,m.. & Schleclit. LiinuBa, 6:38 (1831). 



A soft slender diffuse annual, 10-20 em. high. Sheaths com- 

 pressed, loose; ligule 2 mm. long; blades smooth, 3-8 cm, long, 

 obtuse or abruptly i)ointed, 1.5-2 mm. wide. Panicles mostly 

 exserted, ovoid or pyramidal, 2-4 cm. long, rays mostly in pairs 

 bearing 2-5 spikelets on the outer half. Spikelets subsessile or on 

 short pedicels, oblong. 2-1-flowered, 3-4 mm. long, empty glumes 

 obtuse or acute, tips and margins scarious. first 1-nerved, second 

 longer than the first, elliptical when spread, 3-nerved, 2-2.2 mm. 

 long; floral glume broadly oval, about 3 mm. long, obtuse, mar- 

 gins and upjjer fourth scarious, ciliate on the keels and margins up 

 to the middle ; i)alea nearly as long, linear, ciliate nearly the whole 

 length of the keels. 



Mexico (Jalisco), Palmer 483; Guatemala, J. D. Smith !I07. 



3. P. TKiviALis L. 8p. PL 67 (1753). EoiGii Meadow- 

 grass. P. angndifolia Ucria, Ilort. Eeg. Panorm. 53 (1780). 

 P. ilnhia Leers, Fl. Herborn. 28 (1775). P. HohenacJceri Trin. 

 Bull. Sc. Acad. St. Petersb. 1:69 (1836). P. palnstris 0. F. 

 Muell. Fl. Dan. t. 750 (1761). P. pratensis Pollich, Hist. PL 

 Palat. 1:87. P. Pseudo-hybrida Schur. Enum. PL Transs. 769 

 (1866). P. scahra Ehrh. Beitr. 6:83 (1787). P. i'e/rtcm lluds. 

 Fl. Angl. Ed. 1, 34 (1762). 



Culms 40-60 cm. high, rough or nearly smootli, erect from a 

 slightly decumbent base, with no running rootstocks. Sheaths 

 rough; uj^per ligule 5-6 mm. long, the others shorter; blades of 

 sterile shoots short or as long as the culm, those of the culm 3, flat 

 or conduplicate, abruptly pointed, the upper 5-10 cm. long, about 

 3 mm. Avide. Panicle linear, oblong or moreopon, 10-15 cm, long, 

 rays in half-whorls of 5-6, sets of rays 3-4 cm. distant, the longest 

 5-6 cm. long, flower-bearing along the upper half. Spikelets oval 

 or linear-oblong, 2-4-flowered, 3-4.5 mm. long, joint of rachilla 

 about 0.5 mm. long; first em[)ty glume lanceolate, 1-nervcd, 2-2.5 



