508 THE GRASS FAMILY. [ Panicum. 
Spike-like branches not above an inch long . 2 P.glabrum, 
Spikelets crowded in a simple or branched, spike-like panicle. 
Spike-like panicle cylindrical, the spikelets intermixed with 
numerous, long, awn-like bristles. (S#TaRrA.) 
Bristles rough with reversed hairs, felt as the iiean is drawn 
downwards through the hand 3. P. verticillatum. 
Bristles rough with erect hairs, felt as the spike : is pushed 
upwards through the hand. 
Flowering glume marked with transverse wrinkles . . 4. P. glaucum, 
Flowering glume not wrinkled. 5. P, viride, 
Panicle pyramidal, without awn-like bristles, but the spikelets 
sometimes coarsely awned (EcHINOCHLOA) ° : . . 6. P. Crus-galli. 
1, P. sanguinale, Linn. (fig. 1157). Fingered Panicum.—An annual, 
with stems froin 1 to 2 feet long, more or less spreading or creeping at the 
base, then ascending or erect. Leaves flat, more or less hairy. The panicle 
consists of 2 to 6, or rarely more, simple, slender branches, 2 to 4 inches 
long, and all spreading from nearly the same point at the top of the 
peduncle, so as to appear digitate. Spikelets in pairs along one side of these 
branches, one sessile, the other shortly stalked, each about 1 line long. 
First glume very minute, almost microscopic; the second concave, and 
about half the length of the third, which is nearly flat, and 5-nerved. 
Flowering glume about the same length, very smooth, and awnless, Digi- 
taria sanguinalis, Scop. 
One of the commonest weeds in all tropical and warm countries, becom- 
ing less frequent in central Europe, and scarcely extending into Russian 
Asia beyond the Caspian. In Britain, only as an introduced weed of cul- 
tivation in the south of England. Vl. the whole season. 
2, P. glabrum, Gaud. (fig. 1158). Glabrous Panicum.—Very much 
like P. sanguinale, but a much smaller plant ; the panicle has only 2 or 3 
spike-like branches, each scarcely above an inch long, and the spikelets 
are fewer. The first glume is, as in the last species, very minute, but the 
two next empty ones are both about the same length as the flowering 
glume. Digitaria humifusa, Pers. 
A weed of warm climates, like the last, but rather less tropical, more 
generally spread over central Europe, extending northward to southern 
Scandinavia, and better established in the south of England. FJ. summer 
and autumn. 
3. P. verticillatum, Linn. (fig. 1159). Rough Panicum.—A glabrous, 
erect annual, 1 to 2 feet high, with flat leaves, rough on the edges. _Spike- 
lets small, crowded into a cylindrical hut rather loose, compound spike (or 
rather, spike-like panicle), 1 to 2 lines long, interspersed with numerous 
bristles, 2 or 3 lines long, inserted under the spikelets, but projecting be- 
yond them. These are rough with minute hairs, reversed so as to cling to 
the hand when the spike is drawn downwards through the fingers. First 
glume very small, the two next about the length of the flowering one. 
Setaria verticillata, Beauv. 
In cultivated and waste places, very common in southern Europe, and — 
generally spread over central Europe to the Baltic, and eastward into Rus- 
sian Asia, but much rarer in hot countries than the two following species, 
In Britain, it appears occasionally in the south and east of England. FV. 
summer and autumn, 
4, P. glaucum, Linn, (fig. 1160). Glaucous Panicum.—An erect 
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