Hooded green-and-brown striped spathe sheltering a hidden spadix. Woodland curiosity followed by red berries.
Every part is loaded with needle-shaped crystals that cause immediate, severe burning in the mouth if chewed, along with swelling of the lips, tongue and throat. The pain is its own deterrent, so serious poisoning is rare, but it is a genuinely nasty thing for a child to bite.
For gardeners who like to stay ahead.