and the fourth glume respectively; 6 and
8. palea of the third and the fourth glume respectively; 9. the ovary
and stamens; 10. grain.]

This grass is more common than _C. biflorus_ and is found on the East
Coast districts in open sandy places.

_Distribution._--Nellore, Bellary, the Punjab and the Gangetic Plains.

CHAPTER VII.

TRIBES II AND III--ORYZEAE AND ZOYSIEAE.

=Oryzeae= is a very small tribe with a few genera, which usually flourish
in marshes. The spikelets are in panicles, 1-flowered and the flower is
usually perfect. In Oryza there are three glumes, the first two being
very minute, and there is only a single glume in Leersia and Hygrorhiza.
There are usually six stamens. The palea becomes firm in texture like
the glume instead of remaining hyaline, and so it is often mistaken for
a glume. The spikelets are jointed on their pedicels and fall away from
them.

Not floating; spikelet not awned 11. Leersia.

Floating; spikelets awned 12. Hygrorhiza.

=Zoysieae= is another small tribe with half a dozen genera. The
inflorescence is either a spike-like raceme or a spiciform panicle. The
spikelets are solitary in Perotis, binate in Tragus and grouped in
Trachys. There is usually a complete flower in a spikelet and the glumes
are membranous. Mature spikelets are deciduous with their pedicels
singly in Perotis and in clusters in others.

Spikelets fascicled unilaterally on a
broad rachis, 4-glumed, glumes not
echinate 13. Trachys.

Spikelets binate and all round the
rachis, 3-glumed, glumes echinate 14. Tragus.

Spikelets single, awned and 3-glumed 15. Perotis.

11. Leersia, _Sw._

These are tall perennial marsh grasses. The inflorescence is usually a
more or less contracted panicle with very slender branches. The
spikelets are compressed and consist of only one glume bearing a perfect
flower. The solitary flowering glume is chartaceous, awnless, 3- to
5-nerved, the lateral nerves forming the thickened margin of the glume.
The palea is narrow, linear-lanceolate, as long as the glume, 3-nerved,
rigid, dorsally ciliate, and with hyaline margins. Lodicules are two.
Stamens are usually six in number. Styles are short, with plumose
stigmas and laterally exserted. Grain is ovoid or oblong, compressed,
free within the glume and its palea.

=Leersia hexandra, _Sw._=

This is a slender perennial marsh-grass with stems roo