Pa*pil`io*na"ceous (?), a.
Resembling the butterfly.
2. Bot. (a)
Having a winged corolla somewhat resembling a butterfly, as in the blossoms of the bean and pea.
Belonging to that suborder of leguminous plants (Papilionaceae) which includes the bean, pea, vetch, clover, and locust.
© Webster 1913.