The fleshy seed pod can be cut open to collect its active ingredients.

But when it comes to looking after the royal seed pod, they're totally serious.

No lesson goes by without him leaping up at the sight of some leaf or seed pod floating past the window, then rushing to his notes to record it.

Each flower turns into an individual dark seed pod and stays on the plant to extend the season of interest.

Its distinctive butterfly-shaped (bifoliate) leaf and thin seed pod make it easy to identify.