Phyllotaxy refers to which of the following?

• A. Pattern of arrangement of leaves on the stem or branch
• B. Color of leaves
• C. Type of root system
• D. Leaf venation pattern

Answer: (A)

Phyllotaxy is about how leaves are arranged on the stem or branch. It describes the spatial pattern of leaf placement around the axis—whether leaves appear singly at alternating positions, in opposite pairs, or in whorls, and can include spiral patterns seen in many plants. This is a structural trait of the shoot system and helps optimize light capture and air flow. It’s separate from leaf color, which is about pigments; root system, which concerns below-ground organs; and leaf venation, which is the pattern of veins inside a leaf.