Are darling peas and idiot fruits poisonous?

Yes, darling peas and idiot fruits are poisonous.

Specifically, darling peas (Swainsona galegifolia, S. greyana) also are known as poison bushes because of its production of the toxin swainsonine, which also is the toxin in North America's locoweed. The idiot fruit (IdiOSpermum australiense) also is called ribbonweed. It produces the poison chemical IdiOSpermuline.