FESTUCE.E. 571 



o-nerved or the first 1-nerved, much shorter tlian the florets; floral 

 glume usually chartaceous, rarely herbaceous, convex on tlie back, 

 sometimes slightly keeled, obscurely 5-iiervod, the midiierve often 

 reaching the denticulate apex or extending as a niucro, the lateral 

 nerves all vanishing at some distance below the broad scarious apex; 

 palea with converging ciliolate nerves, 2-toothed. Stamens 3. 

 Styles short, the stigmas nearly sessile, short, sliglitly branched. 

 Crain more or less obcompressed, enc^losed, but not adherent, ob- 

 scurely grooved. 



Perennials or annuals, differing from Poa in the rounded floral 

 glume and in the parallel nerves of the same, in the more or less 

 scarious or chartaceous glumes, and from Panicnlaria in the ob- 

 scure nerves of the floral glume, and the narrower and simpler 

 nearly sessile stigmas. 



A. First glume 1-nerved (a) 



a. Ligule 1.5 mm. long, rays in sets of 2, floral glume 



2.5-3.5 mm. long 1 



a. Ligule 1-2 mm. long, rays 3-5, floral glume 2.5-3 



mm. long 2 



a. Ligule 2-3 mm. long, rays 4-0, floral glume 2.7-3.2 



mm. long 3 



a. Ligule 2 mm. long, floral glume 3.2-4.2 mm. long. . 4 

 a. Ligule 2-3 mm. long, rays 2, floral glume 5-5.5 mm. 



long 5 



a. Ligule 2 mm. long, rays 1-3, floral glume 3 mm. long. G 

 a. Ligule 3-4 mm. long, rays 2-7, floral glume 2.7-4 



mm. long 7 



a. Ligule 3-5 mm. long, rays 2-3, floral glume 4-5 mm. 



long 8 



B. First glume 3-nerved (c) 



c. Ligule 2-3 mm. long, rays in sets of 1-3, floral glume 



4-5.2 mm. long 9 



c. Ligule 2 mm. long, floral glume 3.2-4.2 mm. long. . 4 

 c. Ligule 2-4 mm. long, rays 3-5, floral glume 4-5 



mm. long 10 



c. Ligule 2-3.5 mm. long, floral glume 5-5.5 mm. long. 11 



