v} 
_ GRAMINEAE, 135 
Tring VI. AVENAE. 
Spikelets 2- or several-flowered, usually panicled. Flowering glumes generally 
shorter than the outer glumes, usually awned ; awn geniculate and often twisted, rarely 
straight. 
* Awn of the flowering glumes dorsal, rising from below the terminal teeth of the 
glume, not from between them. 
Spikelets 2-flowered. Flowering glumes erose or 2-toothed at the 
tip, shortly awned wt af 2 i .. 20. DESCHAMPSIA. 
Spikelets 2-6-flowered. Flowering glumes sharply 2-toothed at 
the tip; teeth sometimes almost awned; awn from the back 
just below the teeth i “ye ou 5 .. 2]. TRISETUM. 
Spikelets 5-10-flowered. Flowering glumes rounded at the back ; 
awn dorsal, straight or bent Af 6 we .. 22, AMPHIBROMUS. 
#* Awn of the flowering glumes rising from between the terminal lobes or teeth of 
the glume. 
Spikelets several-flowered. Flowering glumes rounded at the back, 
often ciliate or hairy; awn rigid, often twisted or flattened at 
the base - +s" oe rs +4 .. 23. DANTHONIA. 
TripE VII. CHLORIDEAE. 
Spikelets 1-many-flowered, crowded in two rows on one side of a flat rhachis or 
spike; spikes in racemes or digitate. 
Spikes digitate or scattered at the top of the culm. Spikelets 
compressed, several-flowered, awnless. Outer glumes persistent ; 
flowering glumes deciduous ' : . 24. ELEUSINE. 
Trise VIL. FESTUCEAE. 
Spikelets 2-many-flowered, usually panicled or racemed. flowering glumes gene- 
rally exceeding the outer glumes, awnless or with | or several straight awns, which are 
usually terminal, rarely dorsal. Rhachilla produced beyond the uppermost flower. 
Tall reed-like grasses with silvery panicles. Flowering glumes 
covered with long hairs, membranous. Rhachilla long, glabrous 25. ARUNDO. 
Spikelets 3-5-flowered, usually rounded on the back. Flowering 
glumes 2-3-toothed, middle tooth often mucroniform or slightly 
awned. ay 4 a4 ‘is a .. 26. TRIODIA, 
Panicle spiciform. Spikelets 2—5-flowered, shining, compressed, 
Flowering glumes scarious, mucronate or shortly awned .. 27. KOELERIA. 
Spikelets 2-many-flowered, compressed. Flowering glumes keeled 
at the back, acute or obtuse, awnless, often (together with the 
thachilla) clothed at the base with tangled hairs. Hilum 
punctiform ar i re 95 1 a. 2d. FOAM 
Spikelets 3--many-flowered. Flowering glumes rounded at the 
back, obtuse, awnless, 5-9-nerved. Lodicules distinct. Hilum 
penctiform as x ie e, ok .. 29. ATROPIS. 
Spikelets 2-many-flowered, Flowering glumes rounded on the 
back, more rigid than in Poa, acute or awned. Ovary naked or 
hairy. Hilum long, linear ral +i ~ .. 30, Fustuca, 
Spikelets 3-many-flowered. Flowering glumes rounded on the 
back or slightly keeled, mucronate or awned, 5-9-nerved, 
Ovary villous at the top a i oy, .. 31. Bromus. 
Tribe TX. HORDEAE. 
Spikelets 1-many-flowered, sessile in alternate notches on opposite sides of the 
rhachis of a simple spike, either solitary or several together. Glumes awned or not. 
Spikelets solitary in the notches of the rhachis, 2-many-flowered, 
placed flatwise on the rhachis. Outer glumes conspicuous’ .. 32, AGROPYRUM. 
Spikelets solitary (or in non-New-Zealand species in pairs) at the 
notches of the rhachis, 2—4-flowered, placed flatwise on the 
rhachis. Empty glumes either wanting or reduced to 2 small 
bristles .. ~ ee os + a .. 33. ASPERELLA. 
