proteranthous
/ˌprəʊtəˈranθəs/Botany rare
adjective
Of a plant: having flowers appearing before the leaves. Of leaves: appearing before the flowers.
Origin
Mid 19th century; earliest use found in John Lindley (1799–1865), botanist and horticulturist. From protero- + ancient Greek ἄνθος flower + -ous.