A North American plant, Sanguinaria canadensis, of the poppy family, which has a red root and sap and a single white flower in early spring.
Achillea millefolium or common yarrow, a flowering plant native to temperate regions of the Northern Hemisphere.
Dendrocnide sinuata (synonym: Laportea crenulata), a species of nettle in the family Urticaceae found in Australia and South Asia.