526 



CVIL GRAMINE^, 



but at length cartilaginous and firmly inclosing the carj-opsis - 

 outer one with a long geniculate dorsal awn, with two points or 



bristles at the summit. 



27, 



23 



f f Outer gliimellas with or without a terminal or subterminal awn or bristle 



but no dorsal awn, * 



X Florets not mixed with long silky hairs, 

 § Glumes about as long as the rest of the spikelet. 



i 



Teiodia. Panicle racemed. Spikelets compressed, with 3 4 fer- 

 tile flowers. Glumes as long as the florets, 3-nerved. Glumellas 

 2 ; outer one somewhat coriaceous, rounded on the back, hairp 

 at the base, 3-toothed at the end, middle tooth straight. 



Sesleria, Panicle spiked, rounded. Spikelets laterally compressed 

 with 3 or more perfect florets. Glumes nearly equal, 1-nervedl 

 about as long as the florets. Glumellas naked at the base, mem- 

 branaceous; outer one keeled, jagged, with a short terminal 

 bristle. 



P 



\ 



' §§ Glumes conspicuously shorter than the rest of the spikelet, 

 II Panicle spiked, or somewhat contracted and rigid, 



KoELERiA. Panicle spiked, rounded. Spikelets without a pectinate 

 bractea, distichous, with 3—4 perfect florets. Glumes unequal, 

 membranaceous, keeled, shorter than the florets. Glumellas 

 membranaceous, naked at the base; lower one 3-nerved, keeled 

 pointed, entire. 



Cynosurus. Panicle spiked, unilateral. Spikelets with a pectinate 

 bractea at the base, distichous, with 3 — 5 perfect florets. Glumes 

 2, equal, membranaceous, much shorter than the florets, 1-nerved, 

 keeled, shortly awned. Glumellas membranaceous, linear-lanceo- 

 late; outer one mucronate or awned at the end. 



PoA. Panicle unilateral. Spikelets without a pectinate bractea, with 



-5 perfect florets. Glumes rather unequal, 1-nerved, keeled, 



awnless ; outer glumella scarious on the margin, prominently 5—7- 



nerved. 



22 



30, 



26 



O 



15 



17, 



* y 



26. 



28. 



Panicle or raceme more or less lax, spreading or contracted, 



Catabrosa. Panicle spreading. Spikelets awnless, scarcely com-' 

 pressed, ovate, with 3 fertile florets. Glumes 1-nerved, much 

 shorter than the floret^ Glumellas glabrous on the keel and at 

 the base, membranaceous, very obtuse. Caryopsis free. 



MoLTNiA. Panicle contracted, but rather lax. Spikelets lanceolate,- 

 awnless, with 3 perfect semicylindrical florets and a subulate rudi- 

 mentary neuter one. Glumes 1-nerved, much shorter than the 

 florets. Glumellas 3— 7-nerved, glabrous, entire at the end, at 

 length cartilaginous and inclosing the caryopsis. ' 



PoA. Panicle lax or contracted. Spikelets ovate or linear, com- 

 pressed or cylindrical, awnless. Glumes 2, shorter than the florets, 

 more or less membranaceous. Glumellas 2, somewhat ovate, blunt-' 

 ish, rarely tipped with a minute point. Caryopsis free. 



Briza. Panicle lax. Spikelets awnless, much compressed laterallv, 



cordate-deltoid, with 3 closely imbricated perfect florets. Glumes 



nearly equal, broad. Outer glumella navicular, obtuse, rounded 



on the back, membranaceous with a scarious marrin: inner one 

 small, flat . ° 



/ 



2 



f 



t 







I 



*S 



& 



II.'. 



!,I 



u 



38,1 



31.1 



33,1 



