FEHTICE.K. 668 



U. 8. Oeol. Surv. 6:204, /. 27 (18T8). Tritetum suhnpicatum 

 Tar. mtttirum Boluiul. S. WatH. Hot. (.*ulif. 2:290 (1880). 

 Triaetum lirnnilegei Scrib. ino<l. 



Culms and blades like tlioHo of G. nidivoiihum. Vi\\\\v\q up- 

 right, Bubspieuto, 6-18 cm. long. Spikelets 2-:J-flowered, rurely 4- 

 ilowercdj purjiIiHli, rachillii villous, empty glumes elliptieal-liineeo- 

 late, nearly equal, about 6 mm. long, first 1-nervcd, seeond 3- 

 nerved ; floral glume <)f a largo floret over 5 mm. long, less than 2 

 mm. wide, obscurely 5-n«!rved, obtuse, lacerate, sometimes split or 

 2-tootl)ed, bearing an awn often 1 mm. long; ]»ulea shorter or 

 nearly equal to its glume. Grain oblong, linear. Very nearly 

 allied to G. meUcoideuin, and perhaps only a large form having 

 awns on the floral glume. 



Montana, Williams; Colorado, French \ Oregon, Cusick 1314. 



Montana, Colomdo, Oregon, California. 



131. (250). FAmoVLABIA Fabr. Enum. PI. llort. Helmst. 373 

 (1763). Glyceria U. Br. Prodr. 179(1810). lltjdrochlon Ilartm. 

 Gram. Skand. 8 (1810), not Beauv. (1812). Exydra Kndl. Fl. 

 Posou. 119 (1830). Devauxia Beauv. Kunth, Enum. PI. 1 : 307, in 

 syn. (1833). Diachroa Nutt. Steud. Nom. Ed. 2, 1:497 (1840). 

 Puccinellia Pari. Fl. Itul. 1:366 (1850). Porroteranthe Steud. 

 Syn. PI. Gram. 287 (1854). 



Spikelets several-flowered, pedicellate in n narrow or spreading 

 panicle, rachilla articulate under the floral glumes, glabrous or 

 rarely hairy. Empty glumes obtuse or acute, unawnetl, slightly 

 unequal, shorter than the floral glume, without nerves or 3-5- 

 nerved; floral glume obtuse, unawncd, c<mvex or flattish on the 

 back, nerves 3-9, conspicuous, the nerves not reaching to the 

 hyaline, obtuse, sometimes slightly denticulate apex ; palea nearly 

 as long as its glume, 2-keeled. Stamens 3. Styles very short, 

 distinct, the plumose stigmas frequently more branched than in 

 other genera. Lodicules truncate. Grain glabrous, grooved on 

 the inner side, enclosed in the glume and paleu, free from them or 

 slightly adherent. 



Perennials or rarely annuals, often tall, not unfrequently 

 aquatic, sheaths nearly entire, blades usually flat. 



