LARKSPUR POISONING OF LIVE STOCK. 
59 
Table X. — Summary of feeding experiments upon sheep with Delphinium 
andersonii, 1911. 
No. of animal. 
Weight of 
animal — 
Amount 
of plant 
fed. 
Date of 
feeding. 
Part of 
plant 
fed. 
Amount 
fed to 100 
pounds 
of animal 
weight. 
Location 
from which 
plant fed was 
obtained. 
Before. 
After. 
155 
Pounds 
131 
153 
Pounds. 
126 
149 
Pounds. 
11.3 
12.1 
1911. 
Aug. 11-12 
Aug. 14 
Roots.. 
...do... 
Pounds. 
1 
1.4 
136 
Creek, 
Oreg. 
Do. 
i Dry weight. 
EXPERIMENTAL FEEDING OF DELPHINIUM BICOLOR TO SHEEP IN 1912. 
The preceding experiments of feeding Delphinium barbeyi, D, 
menziesii, and D. andersonii with negative results rendered it ex- 
tremely probable that none of the species of larkspurs are poisonous 
to sheep. It was assumed that probably Delphinium bicolor, the 
Montana low larkspur, would be harmless. In the summer of 1912 
two sheep were fed upon this plant, Table XI, giving the details. 
No symptoms of poisoning occurred in either case, although they 
received much more than it is at all probable they could obtain 
when grazing. 
Table XI. — Summary of feeding experiments upon sheep with Delphinium 
bicolor, 1912. 
No. of 
animal. 
Weight of 
animal. 
Amount of 
plant fed. 
Date of feed- 
ing. 
Part of plant fed. 
Amount 
fed to 100 
pounds 
of animal 
weight. 
Location from 
which plant 
fed was ob- 
tained. 
160 
177 
Pounds. 
92 
51-48 
Pounds. 
23.5 
16.5 
June23-July2 
July 5-12 
Leaves, stems, fruit, and 
some flowers. 
Leaves, stems, and fruit 
Pounds. 
25.54 
32.35 
Geo. Hughes's. 
Do. 
PART III.— RESULTS AND CONCLUSIONS. 
ANIMALS AFFECTED BY LARKSPUR POISONING. 
Cattle. — The experimental work resulted in the confirmation of 
the general opinion of the poisonous effect of the larkspurs upon 
cattle. 
Horses. — Horses may be poisoned by larkspur, but they do not 
voluntarily eat enough of the plants to harm them. They eat more 
or less of it when grazing, but there is no evidence that they are ever 
poisoned by it under ordinary range conditions. 
Sheep. — As the result of the feeding experiments with Delphinium 
barheyi and Delphinium memiesii at the Mount Carbon station, the 
definite conclusion was reached that these two plants do not have 
