I'KSTrCK.K ^^^ 



U-i.crvea or the first 1 -nerved, umcli sl.ortor than the florets; floral 

 glume usiuiUv eliartueeous, rarely l.orbueeous, convex on the bu.-k, 

 sometimes sU-htly k.ele.l, obseurel) r,-nervea, the mi.lnerve often 

 reaching the aenti.-nhite apex or extending as a n.ucro, the hiteral 

 nerves Til vanisliin- at some distance below the broad scarions apex; 

 palea with converging ciliolate nerves, --toothed. Stamens '^. 

 Stvles short, the stigmas nearly sessile, short, slightly branched. 

 (;rain more or less obcomi.resse.1, ench.sed, but not adherent, ob- 



Bcurelv grooved. 



pjrennials or annuals, dilTering from Pou in the roundel floral 

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

 scarions or chartaceous ghnnes, an.l from r<nn-r>,h,n„ m the ob- 

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

 nearly sessile stigmas. 



A. Kirst ulume 1 -nerved ^'^f 



a. Ligule 1.5 mm. long, rays in sets of •.', fl<.ral glume 



•>.')-'3.r) mm. long 



a. Ligule l-".' mm. long, rays S-"., ilond glume -l.r^-'.i 



mm. long 



\ •> 



a. Lignle 2-3 mm. loug. rays 4-!*, floral glume ii.l-o.' 



mm. long 



a. Liiiule 'i mm. h.ng, floral glume ^.l-^.'! mm. long. . 4 

 a. Ligule '>-3 mm. long, rays '^. floral glume .-.-:..:. mm. 



, 5 



Iousj: 



ft. I.iii-ule 2 mm. long, rays l-!], floral gluuH' ;i,nuM. long. b 

 a. Ligule ;5-4 mm. h>ng, rays •>-:, floral glume -.:-4 



mm. long 



a. Ligule '-5-5 mm. long, rays :>-;'., floral gbnue 4-:. mm. 



1»>"^' .'. 



B First ulunu' ;}-m>rved ^' ' 



c r.hnde -^-3 uun. long, rays in sets of 1-3, floral glun.e 



4-5.2 mni. long 



c Licrule 2 mm. Ion-, floral ghune n.2-4.-' mm. long. . 4 

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



mm. long 



c. Li-nle 2 -:5.r. mm. Imig, floral glume r.-.-..5 mm. long. 11 



