Everything about Cement Production Walled city progress update and future plans Dictamnus albus commonly called Gas Plant. While in bloom, it emits a citrusy, flammable oil that briefly ignites when exposed to flame. It's completely harmless to the plant, but incredibly fun. I have Large White Faux Hydrangea Potted Plant houseplants What are the brown spots on the leaves of this plant, is it dangerous and how can I treat it? Gardening & Landscaping Stack Exchange