GRASS FAMILY 55 1 



29. Sesleria. — Spikelets in an ovoid, spike-like panicle, awnless, 

 with a soft ciliate glume below each. 



30. Cynosurus. — Spikelets in a i-sided, spike-like panicle, 

 2 — 5-flowered, with bristly comb-like glumes below them. 



31. KoELERiA. — Spikelets in a sub-cylindric spike, 2 — 5-flowered ; 

 flowering glume membranous, keeled, pointed. 



32. MoLfNiA. — Spikelets in a narrow but loose panicle, lanceo- 

 late, I — 3-flowered ; glumes hardening on the fruit. 



33. Catabrosa. — Spikelets in a spreading panicle, with whorled 

 branches, i — 3-flowered ; empty glumes very unequal, blunt ; 

 flcwering glume truncate at the top. 



34. Melica. — Spikelets in a slender panicle, ovate, awnless, 

 I — 2-flowered ; upper glumes forming a club-like rudiment. 



35. Dactylis. — Spikelets 3 — 5-flowered, densely crowded in a 

 I -sided panicle ; flowering glume shortly awned. 



36. Briza. — Spikelets panicled, pendulous, short, flat, densely 

 and distichously imbricate, 3- or more-flowered ; glumes mem- 

 branous, boat-shaped, blunt. 



37. PoA. — Spikelets panicled, awnless, 2- or more-flowered; 

 glumes acute, unequal ; flowering glume keeled, 3 — 5-veined. 



38. Glyceria. — Spikelets panicled, awnless, many-flowered ; 

 glumes obtuse ; flowering glume sub-cylindric, 5 — 7-ribbed, obtuse. 



39. Sclerochloa. — Differing from Glyceria in the flowering 

 glume being cylindric and faintly 5-veined, the lodicules slender, 

 and the fruit compressed. 



40. Festuca. — Leaf -sheath split to base ; spikelets in a panicle 

 or spike, 3- or more-flowered ; flowering glume rounded at the 

 back ; 3 — 5-ribbed, pointed or awned ; styles at the top of the 

 smooth ovary. 



41. Bromus. — Leaf-sheath split half-way; spikelets panicled, 

 many-flowered ; flowering glume rounded at the back, with a long, 

 dorsal awn ; styles below the hairy top of the ovary. 



42. Serrafalcus. — Leaf-sheath split less than half-way; lower 

 empty glume 5-veined, upper 7 — 9-veined ; otherwise much as in 

 Bromus. 



43. Brachypodiu.m. — Spikelets in a spike or raceme, long, 

 many-flowered ; rachis not indented ; glumes unequal ; flowering 

 glume with terminal awn ; ovary hairy at the top. 



Tribe 8. Hordece. — Spikelets in 2 or more rows, sessile in the notches 

 . of a simple rachis, forming a spike ; rachilla generally produced 



44. LoLiUM. — Spikelets solitary in the notches, with their edges 

 to the rachis, 3- or more-flowered. 



