Triodia. | LXXXIX. GRAMINEA., 545 
as long as the flowering ones or longer; flowering glumes with 3 very 
minute teeth at the top. 
A small genus, chiefly Australian, differing from Avena and its allies 
chiefly in the absence of any awn, from Festwca in the outer glumes 
usually exceeding the flowering ones. 
1. T. decumbens, Beauv. (fig. 1255). Decumbent T.—A tufted 
perennial, 6 inches to a foot high. Leaves narrow, with a few long 
soft hairs on their sheaths and edges, and a tuft of hairs in the place 
of their ligula. Spikelets seldom more than 5 or 6, erect, containing 
3 or 4 flowers, Outer glumes of a firm consistence, but nearly scarious 
towards the edges, 4 or 5 lines long, concave but keeled, very pointed 
and glabrous; flowering glumes deeply concave, ending in 3 minute 
teeth, the central one more pointed, but all 3 often scarcely prominent. 
Steglingia decumbens, Bernh. 
On dry heaths, and hilly pastures, in central and northern Europe 
and western Asia, extending from northern Spain and Italy: far into 
Scandinavia, but not an Arctic plant. In Britain, generally distributed 
and rather common, Fl. summer. 
XL. KGELERIA. KQAILERIA. 
Spikelets few-flowered, in nearly sessile clusters, crowded into an 
oblong or nearly cylindrical spike-like panicle; the glumes keeled, 
scarlous on the edges, pointed, or in some exotic species, awned. 
A small genus, chiefly European and Asiatic, with a few species from 
the southern hemisphere, all closely allied to Poa and Festuca, from 
which they differ chiefly in inflorescence, which is nearer to that of 
Phleum or Phalaris. 
1. K. cristata, Pers. (fig. 1256). Crested K.—A perennial, usually 
about 6 inches high, with a dense tuft of short leaves, chiefly radical ; 
but in luxuriant specimens the stems attain a foot, with leaves almost 
as long. Spike cylindrical, 1 to 2 inches long or even more, the lower 
clusters more or less distant. Spikelets usually 2- or 3-flowered; the 
glumes 14 to 2 lines long, and very pointed ; the outer ones unequal, 
and scarious on the edge only; the flowering ones white and scarious, 
except the green keel, giving the spike a variegated and shining silvery- 
grey aspect. 
In dry pastures, in central and southern Europe, extending more 
sparingly northwards into Scandinavia, in both north and south tem- 
perate regions, Widely distributed over Britain, and abundant in some 
parts, but rare or wholly wanting in others. J. swmmer, 
XLI. SESLERIA, SESLERIA. 
Spikelets few-flowered, in nearly sessile clusters, crowded into an 
ovoid or cylindrical spike-like panicle, as in Keleria, but there is 
usually a glume-like bract on the main axis, at the base of the lower 
spikelets. Outer glumes nearly equal and pointed, the flowering ones 
3- or 5-toothed at the top, the central tooth lengthened into a point, 
or (in exotic species) into a short awn, 
2M 
