This weed is common in the Paonia, Hotchkiss, and Crawford areas. It blooms in May and June.
All parts of the plant are poisonous. It is dangerous for humans as well as livestock, though some poisoned by it have been treated. Alkaloids are responsible for the plants being poisonous and it's said eating rich fish or beef broth, grease, or butter may counteract the poison. The Meadow Deathcamas Toxicoscordion venenosum (called a_tsíniitsoh, literally "big mariposa lily") was used by the Navajo for treatment of coyote bites.
An effective herbicide is 2-4D.
Zigadenus venenosus, commonly called death camas or meadow deathcamas, is a flowering plant in the genus Zigadenus belonging to the Melanthiaceae. It grows up to 70 cm tall with long, basal, grass-like leaves. The bulbs are oval and look like onions but do not smell like onions. The flowers are cream coloured or white and grow in pointed clusters, flowering between April and July. Death camas occurs in some parts of western North America and can be easily confused with edible onions of genus Allium. They tend to grow in dry meadows and on dry hillsides as well as sagebrush slopes and montane forests.