Corolla
The corolla (another C-W communication '' corolla ''), in the field of the Botanical , indicates the part of the Fleur formed by the whole of its Pétale S, in opposition to the chalice, consisted the Sépale S. This definition applies to dichlamydées flowers, i.e. having a complete perianth, with two cycles (word for word “with two tunics”). Certain flowers are monochlamydées (having only one chalice or that a corolla), others are achlamydées (without chalice nor corolla, for example the Euphorbe S).
The corolla can be dialypétale, having petals independent from/to each other. It can also be gamopétale, the petals being plain between them and forming a tube. The top of this tube is called throat, and opens out in lobes.
Traditional botany, primarily descriptive, often made use of the appearance of the corolla to determine the big families of plants with flowers. It is the case in particular following families:
- the crucifères (today brassicacées), whose corolla comprises four petals forming a cross;
- labiées (today lamiacées), whose corolla tubes some opens in theory in two lips, the bilobate upper lip and the lower trefoil one;
- papilionacées (today fabacées), whose corolla is made of five petals. The higher petal, generally set up, is called standard. The two side petals are the wings, while the lower petals, welded between them or very brought closer, form the hull.
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