19+ Adventitious Roots Of Dahlia Pictures. These types of roots are thick and fleshy, and can further be subdivided into different categories based on the location and shape of the swollen parts. A mass of adventitious roots along with its branches constitutes an 'adventitious root system.'

The rooting of stem cuttings is a highly efficient procedure for the vegetative propagation of ornamental plants. While the fine, thick hairs like structure, that spread sideways in all the directions is called fibrous or adventitious root. When the roots become swollen near the tips, they are said to be nodulose.

Adventitious roots are modified into:

Hence, the cellular origin of ar is. These are called reproductive root. These roots serve as means of vegetative propagation. E.g., sweet potato, dahlia etc.