46 GRAMINEAE (GRASS FAMILY) 
about a third of an inch in diameter; spikelets one-flowered 
flattened, the glumes equal, united at base, obtuse, with hairy 
keels; the lemma much shorter, obtuse, and smooth, the awr 
attached slightly below the middle and bent, the portion exsertec 
being usually twice as long as the glumes. (Fig. 19.) 
Means of control 
Drain the ground and follow with a season of intensive cultiva 
tion and fertilization before reseeding heavily to better and muck 
more profitable grasses, such as red-top anc 
timothy. — 
SHEATHED RUSH-GRASS 
Spordbolus vaginifiorus, Wood 
Native. Annual. Propagates by seeds. 
Time of bloom: July to August. 
Seed-time: August to September. 
Range: Maine to South Dakota, southward 
to Florida and Texas. 
Habitat: Dry, sterile fields; waste places. 
A thin, dry, and worthless grass which 
should not be tolerated where anything 
better can be made to grow. Culm: 
tufted, fifteen to twenty inches tall, slender, 
smooth, divergent, or sometimes erect. 
Sheaths about half as long as the internodes, 
loose and inflated; leaves short, less than 
an eighth of an inch wide, smooth beneath, 
rough at base above, involute toward the 
point, Panicles very numerous, included anc 
partly concealed in all the upper sheaths, 
the terminal one only being usually exserted, 
one to two inches long; spikelets thin, the 
glumes unequal, long-pointed, smooth, the 
lower one shorter; lemma rough and hairy 
. 20, — Sheath : 1 
ee rae and exceeded in length by the palea whick 
vaginiflorus). x }. is very sharp-pointed. The seed is freely 
