714 GRAMINEZ 
the palet, with its back turned toward the rachella and often 
enveloping the flower by its enfolded edges: at the base of the 
flower between it and its glume are usually two very small hya- 
line scales, called lodicules. Stamens 1-6, usually 3, with very : 
slender filaments and two-celled usually versatile anthers. Pis- 
til with a one-celled one-ovuled ovary and one to three, usually 
two styles with variously branched mostly plumose stigmas. 
Embryo small, situated at the base of the seed and covered 
only by the thin spies Fruit a caryopsis, usually called a 
grain, with copious mealy albumen. 
| SusorDER 1 PANICACE R. Br. 
Spikelets 1- or 2-flowered, when 2-flowered the upper fertile, 
the lower staminate. Rachella articulated below the glumes or 
the subtending involucre, not extending beyond the flower. 
TRIBE I ANDROPOGONEA Spikelets perfect or one staminate 
or rudimentary, mostly silky. Flowering glumes and palet hya- | 
line, none of the glumes spiny. | 
1 Imperata Spikelets in pairs both perfect: empty glumes clothed with 
long white silky hairs. 
TRIBE. Panice# Spikelet of one perfect flower with a sta- 
minate or neutral one below it, the latter often reduced to a single 
palet ; sometimes appearing as if one-flowered by the supression 
of the lower glume and the palet of the neutral flower. | a 
2 Paspalum Spikelets apparently 1-flowered, plano-conyex, on one side 
of a flattened rachis, without an involucre. 
3 Paricum Spikelets 1:¢-2-flowered without an involucre, the lower 
usually minute. ) 
4. Chetochloa Spikelets 2-flowered, with an involucre of bristles proceed- 
ing from the pedicels. 
TRIBE 11 Oryzem Spikelets usually much compressed lat- 
erally, one-flowered. Empty glumes two or more. Stamens of- 
ten 6. 
5 aa ee Spikelets much flattened: glumes wanting: palet 
_ rigid. 
Suboepes 4. POACHAD R.Br. 
Spikelets not articulated below the glumes, one- to many- 
flowered, the imperfect flowers if any usually uppermost. 
TRIBE IV PHALARIDE® Spikelets more or less laterally com- 
pressed, 1-3-flowered. Glumes 5, the first 2 below the articula- 
tion of the rachella the third and fourth very unlike the others ; 
the fifth with a hermaphrodite flower. | 
6 Phalaris Spikelets 3-flowered, the lateral reduced to a rudiment, the 
fertile coriaceous. 
7 antHoxantuum Spikelets 3-flowered, the lateral neutral, of a single 
