The genus Iris Cambridge Cambridgeshire, The University Press 1913 Iris pictorial works varieties rhizomes, The illustration showcases the intricate structures of rhizomes from two different plant species, highlighting their root systems. The upper section presents the rhizome of a Pogonatum species, characterized by its elongated structures and fine, fibrous roots spreading outward. Below, the rhizome of a Regelia species is depicted, featuring a bulbous base from which numerous thicker roots extend, demonstrating adaptations for nutrient uptake and stability. The intricate details emphasize the importance of these root systems in plant growth and survival in their respective environments.