Additional Common Names:
Found in dry rangelands of southern Colorado, western Texas, New Mexico, Arizona and Northern Mexico.
Plant is toxic year round, although poisonings typically occur in summer and late fall. Horses eating one to ten percent of their body weight in the plant can develop lethal clinical effects. Onset of signs generally occurs after two days to three weeks, and includes incoordination, muscle weakness and tremors, elevated heart rate, cardiac arrhythmias, fluid accumulation and swelling of the nervous system, profuse sweating, inability to swallow.
Toxic to Horses