Pith (Medulla):  Pith is moderately huge and prominent, composed of parenchymatous cells and is placed at the centre. In several stems the vital part of the pith is damaged during growth, but the pith in nodes will be retained. It is still not rather clear if the pith in root and stem is the same. The pith cells primarily serve as storage tissue.

Formation: The pith of young stem contains chloroplast whereas the older stems hold profuse leucoplast. Pith is composed of soft, spongy parenchyma cells, which store and transport nutrients throughout the plant.

Function: Basically, the function of pith is to store nutrition, at the same time, its parechymatous eminence enables it to take accountability of transporting nutrients to outer tissues in the plant.

  • Main function is Storage of food.
  • Another function of the pith of a plant is to provide support to a large plant that is undergoing secondary growth