ANALYSIS OF THE GENERA. TL 
2. GLUMACE A. 
Floral envelopes imbricated. 
ORDER CI. GRAMINEA.—Bnowy. 
Flowers generally perfect, sometimes moncious or polygamous 
consisting of imbricated bracteas, of which the outer ones are called 
glumes, the interior immediately enclosing the stamens, palee or 
glumelle, and the innermost at the base of the ovarium scales or 
glumellules. Glumes generally two, alternate and unequal. Glu- 
melles two, alternate, the lower or outer one simple, the upper or 
inner composed of two, united by their contiguous margins, and 
generally with two keels. Glumellules two, rarely three, sometimes 
very small or wanting. Stamens generally three, rarely one, two, or 
six. Filaments generally free. Anthers versatile, two celled, bifid at 
the base and apex, bursting longitudinally. Ovary simple. Styles 
generally two, sometimes united at the base. Stigmas feathery or 
hairy. Fruit free, or attached to the glumes. Pericarp membra 
nous, usually undistinguishable from the seed. Albumen farinaceous. 
Zimbryo lying on one side of the albumen at the base, lenticular, with 
a broad cotyledon, and a developed plumula; occasionally there is a 
second cotyledon smaller, and alternate with the usual one. Roots 
“fibrous. Rhizoma often creeping, or bulbous. Stem (culm) generally 
jfistular, closed at the joints, rarely solid, and covered with a coat of 
silex. Leaves alternate from the joints, with a divided sheath. 
Flowers collected into small spikelets, and arranged at the apex of the 
stem in panicles, racemes, or spikes, sometimes immersed in the thick- 
ened rachis, or enclosed in a spatha. 
TRIBES. 
Inflorescence a loose or close spike-like 
panicle. 
Spikelets laterally compressed, one or 
two flowered. 
Barren flowers one or two below the 
perfect ONE......s.sseeecccccseeceses L, PHALARIDER. 
Barren flowers rudimentary above 
the perfect one. 
Florets enveloped in long silky 
Wars) oie cas ona cbieewtincenasees «oe ame A UNED ENE Ate 
Florets not enveloped in long silky 
hairs. 
Inflorescence a spike-like panicle 3. PHLEINEA. 
Inflorescence a loose panicle. 
Florets with a short awn, or 
WANTING ..ssccsrecsassees oo 4. AGROSTIDER, 
Florets with a very long awn. 5. STrpacEs. 
