68 CYPERACEAE (SEDGE FAMILY) 
NUT-GRASS 
Cypérus rotindus, L. 
i English names: Nut Sedge, Coco Sedge, Coco-grass, Hydr: 
'yperus. 
Introduced. Perennial. Propagates by seeds and by tuber-bear 
ing rootstocks. 
Time of bloom: July to September. 
Seed-time: August to November. : 
Range: Virginia to Kansas, southward to Florida and Texas. i 
Habitat: All soils; troublesome in cultivated crops, especially ii 
eotton fields. 
This pest is said to have been brought into the United State 
among some garden plants from the West Indies, nearly a centur: 
ago, since when it has spread over a ver" 
large part of the country where the climat 
is propitious to it, extending along th 
coast as far north as New Jersey. It i 
very difficult to dislodge, experience hav 
ing shown that “nothing serves so well t 
propagate it as to plow and replow, wit! 
a view to destroy it,” as a planter state 
in a letter to Dr. Darlington. The smalle 
tubers are sometimes shipped, clinging t 
the roots of garden plants and nurser 
stock, and the seeds are a common im 
purity of southern grass and clover see 
and baled hay; they are hard-coated an 
pass unharmed through the _digestiv 
tracts of cattle and horses, and suc 
manure, without long composting, is 
menace to the land where it is spreac 
(Fig. 34.) 
The fibrous, scaly rootstocks, which ar 
its most mischievous part, are deep-se 
first forming by descending from the bas 
of a young plant, to a depth of six inche 
to a foot or more according to the mellow 
Fra. 34.—Nut-grass (Cy. ness of the soil, and there forming the fir: 
perus rotundus). X%. small, round, potato-like tuber, varyin 
