The term geophytes means a grouping which, according to the Raunkjaer classification for the biological form, includes the perennial vascular plants that overcome the adverse season by means of underground organs, consisting of hypogeal gems, cauline or radical tubers, bulbs or bud-roots .
The geophytes are subdivided in turn into:
– G bulb – Bulbous geophytes: plants whose perennial organ is a bulb from which, every year, both flowers and leaves are born;
– G par – Parasitic geophytes: perennial plants that live at the expense of other plants, from which they draw the sap with specific organs;
– G rad – Radicigemmate geophytes: they are the plants with perennial subterranean organs that carry the buds from which, every year, the aerial part is reformed;
– G rhiz – Rhizomatous geophytes: this category includes plants with a particular underground stem, called rhizome, which every year emits adventitious roots and stems.