3D model of the ancestral flower reconstructed by the new study, showing multiple whorls of petal-like organs, in sets of threes. All living flowers ultimately derive from a single ancestor that ...
In each flower type, all basic four whorls of floral organs are found: Whorl 1: Flowers of Asteraceae lack conventional green sepals, but in most genera, including gerbera, the base of the corolla is ...