FESTUCEJi. 569 



ule broad, obtuse, 5-7 mm. long; blades about 6 in number, 

 smooth or scabrous below aud on the margins, 12-30 cm. long, G- 

 15 mm. wide. Panicle loose, oval, 15-20 cm. long, rays in twos 

 and threes, flower-bearing from near the middle. Spikelets ellipti- 

 cal, -l-G mm. long, 4-G-llowered, joint of rachilla 0.7 mm. long; 

 first empty glume elliptical, 1-1.3 mm. long, 1-nerved, acute, the 

 apex denticulate, second rhombic-oval, nearly 2 mm. long, 3-nerved; 

 floral glume 2-3 mm. long, 5-nerved, scabrid, sometimes with one 

 more obscure nerve on either side, often broadly oval, obtuse, 

 irregularly toothed ; palea but little shorter than its glume. 



Montana, Williams; Washington, Suksclorf for U. S. Dept. 

 Agricul. 63, Lake. Howell in 1886. 



British America to California. 



0. P. fluitans (L.) Kuntze, 782 (1891). Festnca fluifanslj. Sp. 

 V\. 75 (1753). Foa fluitans Scop. Fl. Carn. Ed. 2, 1: 73 (1772). 

 Ghjceria fluitans R. V>y. Prodr. 179 (1810). Deranria fl^lilt^ns 

 Beauv. Kunth, Euum. PI. 1:367, in Syn. (1833). Hijdrorliloa 

 distans Ilartm. Gram. Skand. 8 (1819). ParroteraufJie Druni- 

 mondii Steud. Syn. Fl. Gram. 287 (1855). Glyceria acuminata 

 Schur, Enum. PI. Transs. 781 (1866). Glyceria declinata Breb. 

 Fl. Xorm. Ed. 3, 351. Glyceria denticulata Dum. Obs. Gram. 

 Belg. 107 (1823). Glycena hyhrida Towns. Trans. Bot. Soc. 

 Edinb. 4:27 (1853). Glyceria Integra Dum. 1. c. Glyceria 

 loliacea Godr. Fl. Lorr. 3: 1G8 (1862). Glyceria pedicellata Towns. 

 Ann. & Mag. Nat. Hist. (II.) 5 :105 (1850). Glyceria plicata Fries, 

 Mant. 3:176. G. spicata Guss. Fl. Sic. Syn. 2: 784 (1845). 



Perennial, Avitli creeping rootstock; culms 60-150 cm. high. 

 Sheaths smooth, compressed; ligule broad, lacerate, 4-7-10 mm. 

 long; blades 5-6, flat, usually smooth, often floating, 15-25 cm. 

 long, 3-7-15 mm. wide. Panicle usually narrow, loose, 30-60 

 cm. long, rays mostly in threes and erect, the longest usually about 

 10 (rarely 20) cm. long, bearing few spikelets. Spikelets pale, 

 terete, except when in flower, erect, 1.5-2.5 cm. long, 6-20-flowered, 

 joint of rachilla 1.3 mm. long; empty glumes obtuse, hyaline or 

 membranous, 1-nerved, first 2-3.5 mm. long, ovate to linear, sec- 

 ond ellipticab 2.5-5 mm. long; floral glume sca'urid, oblong, 2.5-5 



