;574 
92. GRAMINE.IS. 
24. Aira. Panicle lax. Glumes 2-flovvcrecl, with or without 
the riuhment of a third (which is sometimes perfected in 
A. caspitosa). Outer pale terete on the back with or with- 
out very faint lateral nerves, awned. Awn dorsal, kneed (in 
A. straight). Ovary glabrous. Fr. not crested. 
25. CoRA'NEPHORUR. Awn clubshaped, straight, jointed in 
the middle, the upper portion elavate, a tuft of hairs at the 
joint. Otherwise like Aira. 
2(i. Trisetum. Spikelets crowded. Glumes 2 — G-flowered. 
Outer pale keeled with faint lateral nerves, ending in 2 acute 
teeth, awned. Awn dorsal, kneed and twisted. Ovary gla- 
brous. Fr. neither crested nor furrowed. 
27. Avena. Glumes 2- or more-flowered. Outer pale with 
lateral nerves, amied, ending in 2 points. Awn dorsal, 
kneed and twisted. Ovary hairy at the top. Fr. crested 
and furrowed. 
28. Arrhenatherum. Glumes 2-flowered with a rudiment, 
lower ji. male with a long dorsal kneed and twisted awn, 
upper with a short straight ami. Pales herbaceous, ending 
in 2 points. Ovary hairy at the top. Fr 
29. Holcus. Glumes 2-flowered, lower perfect awnless (or 
very rarely awned), upper usually male with a dorsal awn. 
Pales hardening on the fruit. 
.90. Triodia. Glumes 2 — 3-flowered. Outer pale rather 
coriaceous, smooth, rounded on the back, bifid with an in- 
termediate broad point sometimes becoming the base of a 
kneed ami. 
Tr. XI. FESTUCINEAE. Spikelets with 2 or more flowers, 
up])er often barren. Glumes shorter than the lowest flower. 
Styles very short. Stigmas protrtided fi-om the base of the 
flower. 
31. Kceleria. Glumes unequal, upper one with 2 or 3 ribs, 
shorter than the compressed 2 — 5-flowered spikelet. Outer 
pale nerved, keeled, acuminate (or with a straight subapicular 
seta). Seed loose. Styles terminal. 
32. Melica. Glumes nearly equal, with lateral ribs, nearly 
as long as the ovate spikelet of 1 or 2 flowers rounded on the 
back and a elublike rudiment of 1 or 2 more. Pales hardening 
on the loose fruit. Styles terminal. 
33. Molinia. Glumes unequal, without lateral ribs, shorter 
than the lanceolate spikelet of 2 or 3 semicylinchical flowers 
and a subidate rudiment of another. Pales hardening on 
the loose fruit. Styles terminal. 
