pa·pil·i·o·na·ceous (pə-pĭl′ē-ə-nā′shəs) adj.
Having a bilaterally symmetrical corolla somewhat resembling a butterfly, characteristic of certain plants of the pea family such as a sweet pea.
co·rol·la (kə-rō′lə, -rŏl′ə) n.
The petals of a flower considered as a group or unit and usually of a color other than green; the inner whorl of the perianth.
per·i·anth (pĕr′ē-ănth′) n.
The part of a flower outside the reproductive structures, usually consisting of the calyx and the corolla.
ca·lyx (kā′lĭks, kăl′ĭks) n. pl.
ca·ly·ces (kā′lĭ-sēz′, kăl′ĭ-) also ca·lyx·es
1.
Botany The outermost part of a flower, consisting of the sepals.
se·pal (sē′pəl) n.
One of the usually green leaflike structures composing the outermost part of a flower. Sepals often enclose and protect the bud and may remain after the fruit forms.
The Lentil FlowerScroll down.