Monkshood (Aconitum napellus) http://itiex.notlong.com/ 22 June 2008 Monkshood (Aconitum napellus) This Fall flowering plant is often for sale in pots in Greenhouses. The flower is well described by Monkshood, which grow on a spike. This plant is exceptionally large. All parts of plant are poisonous if ingested. Requires consistently moist soil; do not let dry out between waterings. I expect many blossoms this year. Common names: Monk's Coule, Helmet Flower, Cat's Tail