A slow but aggressive spreader. Some facts: “In recent years it has been largely employed in experiments relating to the forcing of plants by means of anaesthetics such as chloroform and ether. It has been found that the winter buds, placed in the vapour of chloroform for a few hours and then planted, break into leaf and flower considerably before others not tested in this manner, the resulting plants being, moreover, exceptionally fine.” A poisonous plant that may strengthen the brain and renovate a weak memory. Flowers are associated with May Day in France. Also a book by Balzac.