Audrey bit her lip. She had read most of her textbook, yes, but the Professor's specification of magical plants still made her think a bit more. Several people had already said gillyweed and someone had beaten her to Swampy Sycamore as well. She wanted to answer the question; Audrey was already starting to feel a tad competitive over this house points thing.

When called upon, Audrey answered "Yellow Dock? It grows in shorelines, and they're wet, so maybe it's hardy enough to grow in swamps?"

Had that been said yet? It was in the back of her textbook, in the herbs A-Z bit, but did that make it magical? She'd remembered it because the image of sipping a drink and your hair curling while you quenched your thirst had made her chuckle.