92. GRAMINE.E. 
•A7G 
■43. Serrafalcus. Glumes unequal, herbaceous, many- 
flowered, lower 3 — 5-nerved, upper 7 — 9-nerved. FI. oblong, 
tirngid. Outer jiale with a short seta (usuallv) founded on 
3 nerves from below the tip. Styles below the summit of 
the fruit, lateral. — Sheaths of the 1. scarcely divided half- 
way down. Spikelets narrower upwards. 
44. Brachypodium. G?«mes many-flowered. Outer 
pale rounded on the baek setiyerous at the summit, lateral 
nerves slightly converging not vanishing upwards. Inner 
pale fringed 07i the ribs with rigid seta. Styles terminal. — 
The unequal glumes alone distinguish this from Triticum. 
Tr. XII. HORDEINE.tIS. Spikelets solitary or 2 or 3 together, 
sessile on o])))osite sides of a channeled and toothed rachis. 
(Lateral spikelets often stalked in Hordeum.) Otherwise 
like Tr. XI. 
45. Triticum. Glumes opposite, nearly equal, many-flowered, 
embracing the flowers. Spikelets solitary. 
46. Lolium. Glume solitaiy, or that ne.xt the rachis small, 
with 3 or more flowers. Spikelets placed edgewise on the 
rachis, solitaiy. 
47. Elymus. Glumes 2, both on the same side of the spike- 
let, without awns or seta, with 2 or more perfect flowers. 
Spikelets 2 or 3 together. 
48. Hordeum. Glumes 2, terminating in long set®, with 1 
perfect flower and a stalklike ruihment ne.xt the common 
rachis. Spikelets in threes, often partially barren. 
Tr. XIII. ROTTBOELLIINEjE. Spikelets of one perfect 
flower placed edgewise on the rachis. 
49. Nardus. Spikelets in 2 rows on one side of the rachis, 
of one flower. Glumes 0. Outer pale keeled, tapering into 
a subulate point. Stigmas elongate, filiform, protruded at 
the apex of the flower. 
50. Lepturus. Spikelets solitary, imbedded alternately on 
opposite sides of the rachis, of 1 flower and a superior rudi- 
ment. Glumes 1—2 opposite to the rachis, cartilaginous, 
covering the flower. Pales scarious. Stigmas feathery. 
Tribe I. Panicece. 
1. Digitaria Scop. 
[1. D. sanguinalis (Scop.); 1. and sheaths haiiy, fl. oblong- 
lanceolate glabrous with downy margins (?). — E. B. 849, R. i. 
