842 GRAMINE2. [Imperata. 
Tall reed-like grasses with silvery panicles. Flowering 
glumes covered with long hairs, membranous. Kha- 
chilla 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 . 26. TRIODIA. 
Panicle spiciform. Spikelets 2-5- flowered, shining, com- 
pressed. Flowering glumes scarious, mucronate or 
shortly awned : . 27. KasLeria. 
Spikelets 2-many- flowered, compressed. " Flowering glumes 
keeled at the back, acute or obtuse, awnless, often (to- 
gether with the rhachilla) clothed at the base with 
tangled hairs. Hilum punctiform .. 28. Poa. 
Spikelets 3-many-flowered. Flowering glumes rounded at 
the back, cbtuse, awnless, 5-9-nerved. lLodicules dis- 
tinct. Hilum punctiform ve . Se _ -- 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 .. .. 80. Frsruca. 
Spikelets 3-many-flowered. Flowering glumes rounded on 
the back or slightly keeled, mucronate or awned, 5-9- 
nerved. Ovary villous atthe top .. + .. 31. Bromus. 
Trise 1X. HORDE AS. 
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 i in non-New-Zealand species in pairs) 
at the notches of the rhachis, 2—4-flowered, placed flat- 
wise on the rhachis. Empty eae either wanting or 
reduced to 2 small bristles .. : oe .. 33. ASPERELLA. 
1, IMPERATA, Cyr. 
Tall erect perennial grasses. Leaves long. Panicles long, 
terminal, densely spiciform or narrow-thyrsiform, silky-silvery. 
Spikelets ali similar, numerous, densely clothed with long silky 
hairs, usually arranged in pairs on the continuous branches of 
the panicle, one sessile or almost so, the other distinctly stalked, 
all 1-flowered. Empty glumes 3, subequal, narrow, membranous, 
awnless, 3-9-nerved, the 2 outer clothed with long hairs. Flower- 
ing glume usually much smaller, hyaline. Palea small, broad, 
hyaline, nerveless. Lodicules wanting. Stamens 1 or 2. Stigma 
long, exserted from the tip of the spikelet. Grain oblong, with 
an embryo half its length or more. 
A genus of about 6 species, found in the tropical or warm temperate regions 
of both hemispheres. One of the New Zealand species is very widely diffused, 
the other is endemic in the Kermadec Islands. 
Panicle densely Som, Ligeia obtuse, shining. 
Stamens 2 .. 1. LZ. arundinacea. 
Panicle not so dense, narrow- ‘lanceolate, acuminate, not 
shining. Stamen 1 5a 46 ae .. 2. I. Cheesemanit, 
