Is Larkspur Invasive. May 24 2017 Larkspur. While the flower of a Delphinium has 3 pistils the flower of a Larkspur has only a single pistil.
A hollow stem distinguishes larkspur from poisonous monkshood which has a similar blue flower but with a hood. The larkspur is a beautiful and tall flowering plant with toxic amounts of diterpene alkaloids that can cause serious neuromuscular effects in dogs other animals and humans. On one hand they can become invasive and spread through your garden.
Nuttalls larkspur is one of more than 60 native species of larkspur in the United States.
Its also known as a cattle. This is why wild larkspur is sometimes regarded as a nuisance. Feb 18 2020 Delphinium. It ranges in height from 1 to 2 meters.