FESTUCE^. 543 



Var. minor Scribn. ined. lu every respect diminutive, 5-10 cm. 

 liigh; blades 1-3 cm. loug; panicle 1-2.5 cm. long; spikelets 

 shorter, 3-4-flowered. 



Montana, Scrihtier in 1883. Rocky Mountains. 



Yar. purpurascens (Vasey), P. inuynrascens Vasey, Coult. 

 Bot. Gaz. 6:297 (1881). 



Culms smooth, 3-4.5 cm. high; panicle oblong or pyramidal, 

 5-8 cm. long; spikelets ovate, 8-9 mm. long, 3-5-flowered, second 

 glume 5-G mm. long; floral glume oval acute when spread, 6-7 mm. 

 long, palea 5.5 mm. long. 



Washington, U. S. Dept. Agricul. 628 from Suksdorf. 



A very distinct variety, perhaps a species. 



Washington, Oregon, Rocky Mountains. 



23. P. pratensisL. Sp. PI. 67 (1753). June Grass. Kentucky 

 Blue Grass. Spear-grass. P. cmce2)s Hegetschw. Fl. Schw. 

 81 (1840). P. angustifoUa L. Sp. PJ. 67 (1753). P. attica Boiss. 

 ^ Heldr. Diagn. (I.) 13 : 57 (1842-50). P. cmrnlea Knapp, Gram. 

 Brit. t. 118 (1846). P. cinerea Vill. Hist. PI. Dauph. 2:126 

 <1786-9). P. costata Schum. Enum. PI. Saell. 1: 28. P. depresm 

 J. & C. Presl, Fl. Cech. 20. P. chihia [Honck.] Verz. Aller. Gew. 

 'Teutschl. 235. P. eragrusfifonnis Schur, Yerh. Siebenb. Yer. 

 Naturw. 4:88 (1853). P.fiUfolia Schur, Enum. PI. Transs. 768 

 (186G). P. glahra Ehrh. Beitr. 6:82 (1792). P. gregaUs Suter, 

 Fl. Helv. 1:48. P. lieferophijlla Scheele, Flora, 27:58 (1844). 

 P. humilis YAirh.. Beitr. 6:84 (1792). P. Lcjeunii Dum. Obs. 

 Gram. Belg. 112 (1823). P. malmmulariensis Lej. Fl. Spa. 1: 50. 

 P. narifolia Schur, Enum. PI. Transs. 767 (1866). P. 2nihescens 

 Lej. Fl. Spa. 1 : 51. P. setacea Hoffm. Deutschl. Fl. Ed. 2, 1 : 44. 

 P. strigosa, 1. c. P. subcwnilea Sm. Engl. Bot. t. 1004. P. syl- 

 vicola Guss. Enum. PI. Inar. 371 (1854). P. trivialis Guss. Fl. 

 Sic. Prod. 1:89 (1827). P. Vmarsii Gmel. Syst. 182 (1778). 

 P. viridis Gilib. Exercit. 2 : 530. 



A very variable, common, and widely distributed perennial. 

 ■Culms terete, glabrous, slender or rather stout where not crowded, 

 30-60 (rarely 10-120) cm. high, from copious running rootstocks. 

 Sheaths smooth, subcompressed; ligule truncate, 1.5 mm. long; 



