Hypertext Webster Gateway: "papilionaceous"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Papilionaceous \Pa*pil`io*na"ceous\, a.
1. Resembling the butterfly.
2. (Bot.)
(a) Having a winged corolla somewhat resembling a
butterfly, as in the blossoms of the bean and pea.
(b) Belonging to that suborder of leguminous plants
({Papilionace[ae]}) which includes the bean, pea,
vetch, clover, and locust.
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