PLANTS: HOW THEY LIVE AND HOW THEY ARE MADE
The calyx is formed by the sepals which are the outermost part of the flower and are usually green in color.
We can have:
- calyx dialysepalus if the sepals are free between them;
- gamosepalo chalice if the sepals are united for a portion of variable length. In this case the welded part is called tube and the free part is called flap.
Based on the shape it takes, we can have different types of chalice:
(if it is shaped like a small bell)
tubular or cylindrical
(if it is shaped like a tube)
Beyond these forms we can still have: urceolate if it has a swelling in the middle part, so that it resembles a jar;labiate, if it is divided into two parts; galeato, when one of the petals has the shape of a helmet;rostrate, when they have a deep incision.
(if it is swollen)
Regarding its duration, a glass can be:transientif it falls before the corolla dries up; ephemeralif it falls before the corolla hatches; persistent if it remains until the fruit ripens;rotting if it remains even when it has faded.When, in addition to being persistent, the calyx grows to form a membranous envelope around the increasing. If instead it transforms giving membranous hairs and formations of various appearance that accompany the fruit then it forms the so-called pappus.
In some flowers without corolla, colored or not colored sepals can be conniving that is, separated for the base and greased for the apex. In the so-called throat of some glasses (i.e. at the meeting point between the tube and the flap) there may be special rigid protective hairs that form the so-called carpostegio.
Sometimes the peduncle can carry leaflets below the calyx included between the sepals and the first bratae which form the CALICETTO.
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