Hubflower Plant (Fallout 4)

Ranunculacae Serranus is a plant

Gameplay
The herbaceous plant is a mutated variant of the Ranunculacae species, known before the Great War as hubflowers in the Commonwealth and soot flowers in Appalachia. They are now sizable bushes with large, hanging, bitter-tasting purple flowers that have restorative effects.

Behind the scenes
The real world Ranunculaceae genus is commonly known as a "buttercup" flower.