Horsetail Milkweed (Asclepias subverticillata) Erect-stemmed plant

growing to 5’. Flowers are greenish-white, giving rise to pods 1-3” in May to September. Seed have tufts of long silky hairs. Toxic agent is suspected to be the resinoid galitoxin. Poisons sheep, cattle, horses, chickens and turkeys.

Desert Baileya (Baileya multiradiata)

Annual or weak perennial herb of the sunflower family. Flowers are yellow, with showy heads on long stalks arising from a leafy base. Spring through late fall. The toxic agent is an unknown water-soluble compound. Sheep, goats and rabbits have been poisoned.

Conyza, Coulter Conyza (Conyza coulteri) Herbaceous annual of

the sunflower family. Toxic agent associated

with conyza is unknown. In experiments, conyza has poisoned sheep, goats and cattle.