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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 geyeri is a poisonous plant, though the toxicity of the plant is variable from year to year. It also varies in toxicity during the year with the plant's being most toxic before it flowers. [6] This has been known since at least 1916. [29] The primary toxic agents are browniine, 14-acetylbrowniine, geyerine, and 14-dehydrobrowniine.
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.
larkspur Ranunculaceae: Young plants and seeds are poisonous, causing nausea, muscle twitches, and paralysis; often fatal. Other plants in the parent genus Delphinium are also poisonous and commonly called larkspur. [95] Convallaria majalis: lily of the valley Asparagaceae
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.
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 grandiflorum is a species of Delphinium known by the common names Siberian larkspur and Chinese delphinium. It is native to Russia and China . There are several popular cultivars in several colours which are grown as ornamental plants , including 'Blue Butterfly', 'Summer Morning', 'Blue Mirror', and 'Summer Stars'.
Consolida ajacis (doubtful knight's spur or rocket larkspur) is an annual flowering plant of the family Ranunculaceae native to Eurasia. It is widespread in other areas, including much of North America, where it is an introduced species .