216 ROSACEAE (ROSE FAMILY) 
rather thin skin is a layer of soft pulp, but within they are 
stuffed with the hard, hairy, straw-colored achenes. 
Means of control 
Old bushes require grubbing for their removal. Young ones, 
while the canes are still green, may be destroyed by repeated cut- 
ting and salting, or by treating with a little caustic soda about the 
roots. 
PRAIRIE ROSE 
Rosa arkansana, Porter. 
Other English names: Running Brier-rose, Prairie Bramble. 
Native. Perennial. Propagates by seeds and by rootstocks. 
Time of bloom: June to July. 
Seed-time: Hips ripe in autumn but retained until winter. 
Range: Manitoba, Minnesota, and the Dakotas, southward to 
Colorado, New Mexico, and Texas. 
Habitat: Prairies; fields, meadows, 
pastures, waste places. 
In spite of its beauty this plant is 
considered a bad weed throughout its 
range, for, though itself but one or 
two feet tall, it has long, deep-run- 
ning, branching, underground stems, 
which, from the axils of their scales, 
send up many flowering shoots. It is 
especially troublesome in grain fields 
and is now established, in a number 
of eastern localities, the seeds having 
been an impurity of western oats. 
Stem erect, slender, bristling with 
very thin, fine prickles. Leaflets 
seven to eleven, obovate, finely and 
sharply toothed, smooth on both 
sides, seldom more than an inch 
, long; stipules long and narrow, some- 
Fic. 156.— Prairie Wild Rose times toothed above, and more or 
(Rosa arkansana). X 4. less glandular. Flowers pink, large, 
