62 
Colorado Experiment Station 
white and about 3 inches long. The fruit is an oval capsule, beset with 
long, stiff prickles. The plant has been found in waste places at a num¬ 
ber of low altitude points in eastern Colorado. 
Poisoning bv Jimson zveed. —The poisonous alkaloids atropin and 
hyoscyamin, the active constituents of belladonna, are also found in 
the jimson weeds. Hyoscyamin is the poison found in henbane and 
the symptoms camsed by it are the same as from atropin. There are 
a few instances recorded in which cattle have been poisoned by eating 
the leaves of young plants; with few exceptions, however, jimson 
weeds are rejected by animals. 
THORN-APPLE, PURPLE STRAMONIUM (Datura tatula) 
This is very similar to the preceding. It is distinguished from it 
by its purple flowers and purple stem. It is rare in this state. It is 
of little economic importance. 
TPIORN-APPLE (Datura meteloides) 
This plant often grows to be 3 or 4 feet high. The leaves are 
large, and wavy about the margin; the flowers are white, sweet-scent¬ 
ed, 6 to 8 inches long, and the large, nodding pods are armed with short 
prickles. It is found along streams in southern Colorado, at low alti¬ 
tudes. It is suspected of being poisonous to animals. 
WOODY ASTER (Xylorhiza parryi) 
Although this plant (fig. 89) has not been reported from' Colo¬ 
rado, it may be looked ifor in the northern part of the state. It has been 
identified in Wyoming as the cause of the death of sheep. Herewith 
follows a description o'f the plant as taken from Bulletin 97, Wyoming 
Agricultural Experiment Station: 
‘Whis plant has a strong woody root more or less branched 
just at the surface of the ground. From these woody crowns tufts of 
Fig'. 89.—Woody aster (Xylorhiza parryi). 
