Known As:  (Cultivated) Larkspur, Dwarf Larkspur, Staggerweed, Poison Weed
Latin Name:  Delphinium ajacis, Delphinium tricorne
Description: Part of the buttercup family.  Ranges in height from 6 inches to 4 feet.  Has alternate, deeply-lobed leaves and spikes of spurred white, blue or purple flowers.  Roots grow in tuberous clusters.
Poisonous Parts:  All parts, especially yong leaves and seeds. Moderate toxicity.  Toxicity varies aand is strongest in early growth and when plant goes to seed.  Toxin is a mixture of alkaloids including ajacine and delphinine that block communications between the nerves and muscles.
Symptoms: Vomiting, abdominal pain, cramps, and diarrhea. Nervousness, incoordination, staggering, salivating, bloating, abnormal heart beat, breathing difficulty, paralysis, convulsions, death. Symptoms appear within a few hours of ingestion.
Treatment: Unless your cat is unconscious or having convulsions, induce vomiting and follow procedures to delay absorption and speed elimination.  Get prompt veterinary assistance. There is no antidote but veterinarian may evacuate the stomach.  Affected animals should not be handled more than necessary since stress worsens the signs.