The primary stem which supports an inflorescence is called

The peduncle is the main axis of an inflorescence or the axis bearing a flower or fruit. Thalamus is the thickened part of a stem from which the flower organs grow in angiosperms.Receptacle is the swollen part of a flower stalk where the parts of the flower are attached.Vegetative shoot refers to the stem, leaf and all growing tips of the plant.