CLASSES, &c. AND GENERA ARRANGED. xcv 



valve 3iwne^ (rarely awnless near the base.") Seed iree. Corolla 

 unchanged. — Page 19. 



Me'lica, (J^Ielic-grads.) Florets one or two, with the rudiments 

 of one or two intermediate ones. Seed free, covered with the 

 hardened cartilaginous corolla. [Panicle lax.) — Page 21. 



HoLCUS, (^Soft-grass.) One floret barren. (" Upper floret with 

 stamens only, and awned : lower floi'et perfect, awnless.") 

 Calyx keeled. Seed covered by the hardened corolla. {Panicle 

 lax.)— Page 21. 



*** Flowers dispersed. Calyx containing many florets. 



Briza, {Quaking-grass.) Corolla awnless, bellying out, concave, 

 keelless. Seed depressed, united to the corolla. (Panicle) lax. — ■ 

 Page 24. 



PoA, {Meadow-grass.) Corolla awnless, compressed, keeled, 

 valves somewhat egg-shaped, acute. Seed free, elliptic-oblong. 

 —Page 23. 



Glyc'eria, {Sweet-grass.) Part of Linnean Genus Poa. Corolla 

 awnless, cylindrical, furrowed, ribbed, abrupt, not keeled. Seed 

 free, cylindric-oblong. — Page 22. 



Trio'dia, {Heath-grass.) Part of Poa Linn. Corolla round, ex- 

 panded, obscurely ribbed, two-valved ; outer valve with three 

 nearly equal teeth, the middle tooth straight. Panicle in a 

 raceme, (cluster.) Seed loose, depressed. — Page 24. 



Da'ctylis, {Cock' s-foot-grass.) Corolla awned at the top, spear- 

 shaped, keeled, compressed ; inner valve folded, two-ribbed. 

 Seed loose, oblong. Calyx compressed, taper-pointed, unequal, 

 —Page 25. 



Festu'ca, {Fescue-grass.) Corolla awned at the top ; or pointed, 

 keeled, almost cylindric, concave ; inner valve flat, two-ribbed, 

 downy at the ribs. Seed loose, oblong. Calyx concave, acute, 

 of (two) unequal valves. (" Panicle lax, or close, or spiked.") 

 — Page 25, 



Cynosu'rus, {Dog' s-tail-grass.) Calyx two-valved, equal, awned,. 

 having a comb-like (pectinated) involucre. Corolla two-valved,.. 

 valves linear-spear-shaped. — Page 25. 



Bromus, (Brome-grass.) Corolla awned at the back, cloven, con- 

 cave, hollow ; inner valve flat, two-ribbed, bristly at the ribs. 

 Seed united to the inner valve. — Page 28. 



Ave'na, {Oat, or Oat-grass.) Corolla nearly cylindric, of two 

 spear-shaped valves, firmly inclosing the seed ; outer valve bear- 

 ing a twisted backward dorsal awn. — Page 30. 



