Board Thread:Off Topic/@comment-27966940-20190818020911/@comment-26397825-20191102010522

Wisteria is purple, and all parts of the plant contain a saponin called wisterin, which is toxic if ingested, and may cause dizziness, confusion, speech problems, nausea, vomiting, stomach pains, diarrhea and collapse. It's debatable if there's enough toxin outside the seed pods to cause the same issues, but it is there.

There's also the Nightshade plant, which Blake incorporates into her design. Those flowers are also purple, and the plant is extremely toxic.