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Delphinium geyeri is a species of plant in the Ranunculaceae family that is often called by the common names plains larkspur and foothills larkspur. It is infamous for causing the deaths of cattle grazing in the spring because it is especially poisonous before it flowers and so it is also called poisonweed by ranchers. It is a medium to tall ...
Hungry or thirsty horses are more likely to eat poisonous plants, as are those pastured on overgrazed lands. [5] Animals with mineral deficiencies due to poor diets will sometimes seek out poisonous plants. [6] Poisonous plants are more of a danger to livestock after wildfires, as they often regrow more quickly. [7]
All parts of these plants are considered toxic to humans, especially the younger parts, [2] causing severe digestive discomfort if ingested, and skin irritation. [2] [3] [10] [64] Larkspur, especially tall larkspur, is a significant cause of cattle poisoning on rangelands in the western United States. [65]
Delphinium trolliifolium is a species of larkspur known by the common names poison delphinium, cow poison, and Columbian larkspur. It is native to Washington, Oregon, and northern California. [1] This wildflower reaches one half to just over one meter in height. It has large, shiny, deeply lobed leaves.
There's always the tendency to think "If it doesn't hurt me, it won't hurt my horse", and the similar view with dogs leads to feeding chocolate, onions, and grapes, all of which are toxic to dogs.--Curtis Clark 14:38, 13 December 2010 (UTC)
Delphinium hesperium is a species of larkspur known by the common name foothill larkspur. It is also sometimes called western larkspur and coastal larkspur , but these names are less specific since other species share them.
Delphinium nudicaule, known by the common names canyon larkspur, red larkspur, orange larkspur, and canyon delphinium, is a flowering herbaceous perennial plant in the buttercup family Ranunculaceae. It is native to low-elevation canyons and slopes, foothills, and mountain ranges of California, US, from the Sierra Nevada to the California Coast ...
Delphinium glareosum (common names include Olympic Mountain larkspur and rockslide larkspur [2]) is a species of larkspur which grows in Oregon, Washington, and British Columbia. [3] It is in the Ranunculaceae (buttercup family). These plants favor rocky slopes. They flower in summer. Like all members of the genus Delphinium, rockslide larkspur ...