Achyranthes splendens

Achyranthes splendens (Ewa hinahina; also called Maui chaff flower, round chaff flower, round-leaf chaff flower, or round-leaved chaff flower) is a species of flowering plant in the pigweed family, Amaranthaceae, that is endemic to Hawaii. Its natural habitats are dry forests, low shrublands, and sandy shores. It is threatened by habitat loss. Native Hawaiians have, for centuries, considered its extract to be an effective natural cure for constipation.