LARKSPUR POISONING OF LIVE STOCK. 15 
or less viscid. The leaves are large and deeply cleft into about 
five segments, and these segments are more or less deeply incised. 
The leaf segments are oblong or obovate-cuneate. The blue-violet 
flowers are in a dense terminal raceme, the pedicels being longer 
than the spurs. The ovaries are bluish. 
Delphinium harheyi has a lower limit of altitude of about 8,000 
feet, growing from that point nearly to the timber line. It grows 
best in damp valleys and canyons, where it may form dense masses. 
It is found in the mountains of Colorado, Wyoming, and Utah, and 
perhaps in the adjoining States to the north and south. It starts 
growth early in the spring and at the Mount Carbon station attains 
a height of from 1 to 2 feet by the month of June, forming succu- 
lent bunches much more prominent than the grass, and doubtless 
somewhat attractive to grazing animals. The plant grows to a 
height of from 3 to 7 feet, the blossoms appearing about the 1st of 
July and the seeds the latter part of the month. The exact time of 
flowering varies, of course, with the season and the altitude. All 
vegetation at the Mount Carbon station was from one to two weeks 
earlier in 1910 than in 1909, and at Kebler Pass, 1,000 feet higher 
than the station, flowering plants were collected for feeding as late 
as the middle of August. The seeds are shed very soon after being 
matured, and the plant begins to dry up, the stems and leaves 
gradually becoming brown and dry. 
Delphinium cucullatum A. Nels. 
Delphinium cucullatum (PI. II, fig. 1) resembles Delphinium har- 
heyi very closely in its habit and occurrence. The stems are gla- 
brous and the leaves divided into three to seven segments. The 
terminal racemes are closely flowered. The sepals are bluish-white, 
the petals violet, and the ovaries white. The general appearance of 
the flowers is bluish-gray, this coloration appearing to be constant 
for the species. Near the Grej^cliff station the plants blossomed the 
last of July. 
D. cucullatum is found in Montana, Wyoming, Idaho, and as far 
south as central Utah. 
Delphinium eobustum Rydb. 
Delphinium rohustum is a perennial occurring in the mountains 
from Montana to New Mexico and grows in the same general way as 
Delphinium harheyi. The stems are puberulent but not viscid. The 
leaves are divided into five to seven segments, which are long and 
twice cleft into linear lobes. It has the same general habits as 
Delphinium harheyi, but does not confine itself so closely to the 
canyons and is readily distinguished from harheyi by the form of 
the leaves. 
