Noun: Efflorescence (ef-luh-RESS-unss)
1. The action or process of developing and unfolding as if coming into flower or an instance of such development.
2. Fullness of manifestation: culmination.
3. The period or state of flowering.
Sample sentence: Perhaps a collective sense of anxiety about the natural world … has prompted an efflorescence of books about trees from an aesthetic and cultural standpoint in the last decade or so.