GRASS TRIBE 57 
26. Oat-grass (Avéna).—Spikelets panicled, large, rounded, 2 or more 
flowered, the upper flower usually imperfect ; empty glumes 2; flowering 
glume as large as the empty ones, with a cleft tip, from which arises a long 
bent and twisted awn. Name the old Latin for the oat. 33. 
27. Oat-like-grass (Arrhendtherum).—Similar to Avena, but differing in 
having the upper flower perfect and the lower imperfect. Name from “the 
Greek arrhen, male, and ather, awn. 20. 
Tribe VII. CHLORIDEa.—Spikelets sessile, in 2 rows in one-sided spikes ; 
lowest flower of spikelet perfect ; awns when present straight and terminal. 
28. Dog’s-tooth-grass (Cynodon).—Spikelets small in slender spikes, 
which are arranged in a digitate manner at the end of the panicle, the 
rachilla produced beyond it in a small point or bristle. Name from the Greek 
kuon, a dog, and odous, a tooth. 43. 
Tribe VI. FEestuck#.—Spikelets panicled cr subspicate ; rachilla usually 
produced beyond the flowering glume, often bearing a rudimentary glume ; 
glumes 6 or more, the 2 lowest empty ; awn if present terminal. 
29. Heath-grass (Tviddia).— Spikelets rounded in panicle, 3—5- 
flowered, upper flower often imperfect ; rachilla jointed between the flowers ; 
flowering glumes 3-toothed, keeled. Name from the Greek trezs, three, and 
odous, a tooth. Zi: 
30. Reed (Phragmites).—Spikelets panicled, half-round, 3—6-flowered, 
of which the two lowest contain stamens only, the others perfect ; empty 
glumes 2, short, keeled, unequal ; flowering glumes clothed in long silky basal 
es except the lowest, which is naked. Name from phragmites, materials 
for an enclesure. 34. 
31. Moor-grass (Sesléria).—Spikelets crowded in a dense egg-shaped 
head, with bracts sheathing the lower footstalks ; spikelets compressed 2—6- 
flowered ; rachilla jointed above the lower glumes ; empty glumes 2 ; flower- 
ing glumes 2 or 3, smaller, the upper rudimentary. Name from L. Sesler, 
an Italian botanist. 23. 
32. Dog’s-tail-grass (Cynosiirus).—Spikelets of two forms in a dense 
spike-like panicle; upper spikelet rounded, 2—5-flowered, with an upper 
empty glume; lower spikelets reduced to an involucre of awl-shaped and 
rigid empty glumes, which are arranged in two rows up the rachilla; empty 
glumes 2; flowering glumes leathery, opaque, rounded, 3-keeled. Name 
from the Greek kuon, a dog, and oura, a tail. 30. 
33. Koeler’s grass (Koeléria).—Panicle spike-like; spikelets oblong, 
compressed, 2—5-flowered ; rachilla jointed between the flowering glumes 
and terminated by 2 or 3 empty glumes; flowering glumes one-sided, rather 
longer than the empty ones, slightly keeled. Named in honour of G. L. 
Koeler, a German writer on grasses. 22. 
34. Molina’s grass (Molinia).— Panicle contracted ; spikelets somewhat 
rounded, 1—5-flowered, the uppermost imperfect ; empty glumes 2; flowering 
glumes longer, conical, awnless, strongly 3-nerved. Named in honour of 
G. J. Molina, a Spanish botanist. Li. 
35. Whorl-grass (Catabrésa).—Panicle branched, spreading ; spikelets 
Iv.—8 
