Primary function is to
hold leaves and flowers in optimum position and
provide a transport link between roots and leaves.
Protection (stem spines/thorns of Crataegus/prickles of Rosa) also used for climbing.
Storage or perennation:
Corms – Crocus, stem tubers – Begonia, rhizomes – Iris germanica.
Wisteria by twisting.
Natural vegetative reproduction:
Stolon’s or runners – Fragaria, rhizomes – Festuca rubra, stem tubers – Solanum tuberosum.