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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 ...
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 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 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 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.
Since larkspur is common in high-elevation locations, many ranchers wait to move their cattle until the end of summer owing to a decrease in toxicity. Delphinium scopulorum is so toxic that death can occur within a few hours of ingestion. Death is due to neuromuscular blocking as well as cardiotoxic effects.
Delphinium glaucum, known by the common names Sierra larkspur, mountain larkspur, and glaucous larkspur, is a species of wildflower in the genus Delphinium, which belongs to the buttercup family, Ranunculaceae. It is native to western North America from Arizona to Alaska, growing in moist mountainous environments such as riverbanks and meadows.
Delphinium treleasei, commonly known as named glade larkspur or Trelease's larkspur, is a perennial flowering plant found it temperate areas of the eastern United States. [2] It is native to Missouri and Arkansas [ 2 ] where it is often situated in limestone glades but is not common in North America.