In the high rocky valleys of North America, Delphinium scopulorum unfolds its blue-violet spikes among the high-altitude scree. Indigenous nations and the first botanists of the American West knew this plant above all for its danger, classing it among the herbs to be handled with extreme caution rather than among the common simples.
Some traditions report a very limited external use, as a diluted poultice, against lice or certain skin parasites, due to the recognized toxicity of the sap and seeds to insects.
In certain mountainous regions, the dried and ground plant is said to have been used, with great caution, as a repellent against certain external parasites of farm animals.
Among several Rocky Mountain peoples, wild larkspur figured more in cautionary tales told to children than in therapeutic uses, so feared was its toxicity.
The early naturalists and ranchers of the American West mainly documented this species for its role in livestock poisoning, making it historically a subject of toxicological rather than medicinal study.
All parts of the plant, especially the young shoots and seeds, contain highly toxic diterpenoid alkaloids (including compounds related to aconitine) for both humans and livestock. No traditional internal use is considered safe: ingestion can cause serious, sometimes fatal, cardiac and respiratory disturbances. Absolutely to be avoided in pregnant or breastfeeding women, in children, and in those undergoing treatment for the heart or blood pressure. Never confuse with edible plants or other ornamental delphiniums; in case of accidental ingestion, contact a poison control center immediately.
Partner herbalists — available with the detailed notebook.
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