the hypothetical plant hormone that induces flowering, thought to be synthesized in the leaves as a photoperiodic response and transmitted to the flower buds
Word origin
C20: from Latin flōr-, flōsflower + -gen
florigen in American English
(ˈflɔrədʒən; ˈflɔrəˌdʒɛn)
US
noun
a plant hormone thought to stimulate the flowering of plants
Word origin
< L flos (gen. floris), flower + -gen: so named at California Institute of Technology