376 97. GRAMINEA. 
keel, with 1 or more flowers. Outer pale rounded on the 
back with a terminal seta. Each spikelet with a pectinated 
bract (abortive spicula) at its base. Panicle spicate, 1-sided. 
40. Dacty.is. Glumes unequal, herbaceous, many-flowered, 
the larger keeled. Outer pale compressed, keeled, 5-nerved, 
the dorsal nerve fringed and excurrent just below the summit 
forming a short seta. Spikelets crowded, subsecund. 
41. Festuca. Glumes unequal, herbaceous, many-flowered. 
Outer pale rounded on the back, very acute, or with the 
dorsal nerve excurrent at or just below the apex (if elongated 
usually called an awn), lateral nerves slightly converging 
and vanishing below the apex. Inner pale minutely ciliated 
on the ribs. Styles terminal.—Rachis with acute angles. 
Sheaths of the leaves divided to the base. 
42. Bromus. Glumes unequal, herbaceous, many-flowered, 
lower 1-nerved, upper 3—5-nerved. Fi. lanceolate, com- 
pressed. Outer pale with a long seta (usually) founded on 
3 nerves from below the tip. Styles below the summit of 
the fruit, /ateral.—Sheaths of the 1. divided half-way down. 
43. Szrraraucus. Glumes unequal, herbaceous, many- 
flowered, lower 3—5-nerved, upper 7—9-nerved. F. oblong, 
turgid. Outer pale with a short seta (usually) founded on 
3 nerves from below the tip. Styles below the summit of 
the fruit, dateral.—Sheaths of the 1. scarcely divided half- 
way down. Spikelets narrower upwards. 
44, Bracnypopium. Glumes unequal, many-flowered. Outer 
pale rounded on the back setigerous at the summit, lateral 
nerves slightly converging not vanishing upwards. Inner 
pale fringed on the ribs with rigid sete. Styles terminal.— 
The unequal glumes alone distinguish this from Triticum. 
Tr. XII. HORDEIE. Spikelets solitary or 2 or 3 together, 
sessile on opposite sides of a channeled and toothed rachis. 
(Lateral spikelets often stalked in Hordeum.) Otherwise 
like Tr. XI. 
45. Triricum. Glumes opposite, nearly equal, many-flowered, 
embracing the flowers. Spikelets solitary. 
46. Louium. Glume solitary, or that next the rachis small, 
with 3 or more flowers. Spikelets placed edgewise on the 
rachis, solitary. 
47. Evymus. Glumes 2, both on the same side of the spike- 
let, without awns or sete, with 2 or more perfect flowers. 
Spikelets 2 or 3 together. 
