This produces a short branch and a long branch at each dichotomy. These alternate to give the illusion of a dominant main axis. The growth form produced is called Pseudomonopodial . True Monopodial Growth has its origin in Lateral Branching . Lateral Branches originate subapically and are associated with Leaves on stems.
Lateral roots have an internal origin near the Stele .
The main root is called the Primary Root while the Branches are called Secondary Roots. Lateral Branching is characteristic for Angiosperms and Gymnosperms which constitute the most advanced plants on earth. Flax stems are relatively unbranched until they produce Flowers.