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A plant hormone that promotes flowering.

[Latin flōs, flōr-, flower; see bhel- in Indo-European roots + -gen.]

flor′i·gen′ic (-jĕn′ĭk) adj.


(Botany) the hypothetical plant hormone that induces flowering, thought to be synthesized in the leaves as a photoperiodic response and transmitted to the flower buds
[C20: from Latin flōr-, flōs flower + -gen]


(ˈflɔr ɪ dʒən, -ˌdʒɛn, ˈfloʊr-)
a hormone produced by leaves that stimulates flowering in plants.
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References in periodicals archive ?
The winning board contained the words florigen, trooz, venerate, contuse and barf.
In his previous work, CSHL Associate Professor Zach Lippman and Israeli colleagues identified a rare example of hybrid vigor involving a genetic defect in the gene that makes florigen, a hormone that controls the process of flowering and flower production.
It seems particularly ironic that, in the age of modern miracles and molecular biology, such a compound could not be isolated, but scientists are coming closer to the conclusion that florigen may be a combination of substances perhaps including gibberellin and other hormones.