radiatiform
/ˌreɪdɪˈeɪtɪfɔːm/Botany rare
adjective
Of a flower head: apparently radiate; having ray flowers at the margin of the disk, or marginal tubular flowers that are larger than the inner ones.
Origin
Mid 19th century; earliest use found in John Balfour (1808–1884), botanist. From radiate + -iform.