32 
CoivORADO Experiment Station 
The large leaves, 2 to 6 inches in diameter, are divided into 5 to 8 
wedge shaped main divisions, each of which is further divided, usu¬ 
ally into 3 segments. The pale blue flowers are in a rather short, 
loose cluster, d'he fruit is hairy. The tall larkspur is found mainly 
in the mountains, from 7,000 to 9,000 feet, in moist places. 
Poisoning by larkspur .—There can be no question that in the 
mountainous districts of Colorado the several species of larkspur 
cause a greater loss to stockmen through poisoning than all other 
poison weeds combined. Laboratory experiments indicate that the 
different species vary as to their poisonous qualities, and that the 
poisonous qualities of any one of them is not to be depended upon at 
all times throughout the season. The white larkspur which grows on 
the plains east of the mountains, has never been reported fo the Ex- 
l)eriment Station, as having caused any trouble. Stavesacre which is 
derived from one species of larkspur has long been used in medicine. 
The eclectic physicians use it for its specific action on the reproduc¬ 
tive organs but its principal use has been to destroy lice on the heads 
of children. 
I'ig. 40.—C.ever’s larksimr (Delphinium geyeri). 
