petalody
/ˈpɛtələʊdi/ /ˈpɛt(ə)ləʊdi/Botany
noun
Transformation of parts of a flower, usually stamens or sepals, into petals or petal-like structures (as a teratological or evolutionary phenomenon).
Origin
Mid 19th century; earliest use found in Maxwell Tylden Masters (1833–1907), botanist and journal editor. From ancient Greek πεταλώδης leaf-like + -y, apparently after petalodic.