Which term is used for the leaf arrangement in Alstonia?
Alstonia exhibits whorled phyllotaxy, where more than two leaves arise at a node. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.