Coi,oRADo Plants Injurious to Livestock 
43 
Fig. 58.—Richardson’s loco (Aragallus richardsonii). 
There is a variety of the purple loco (Aragallus lambertii seri- 
ceus) v^^hich is stouter in appearance and has more silky, and broader 
leaflets than the regular form. 
White-Flowered Loco (Aragallus albiflorus). —This grows in 
about the same habitats as the purple loco. It precedes the purple 
one, however, by a week or so. It also extends to higher altitudes 
(up to 11,000 feet). It is a more robust plant. It is covered with 
silvery hairs. There are silky white hairs on the calyx and with them, 
interspersed, a few black hairs. The flower is white, with a character- 
stic purple tip on the keel. The plant is held with suspicion. 
Richardson’s Loco (Aragallus richardsonii) (fig. 58).—This 
is found only in the mountain valleys. It is readily distinguished 
from the preceding locos by the leaf; in it the leaflets are arranged 
