Question

In Citrus, Duranta, Bougainvillea, thorns are modified

Answer 1

Introduction to thorns

Thorns are the sharp and pointed structures which represent modified stems.

They are derived from internal tissues of a stem and possess a vascular bundle surrounded by a cortex of thick walled cells. They are deep seated and cannot be easily pulled out.

Thorns of Citrus, Duranta, Bougainvillea

In Citrus, Duranta, and Bougainvillea the axillary buds of the stem are modified into thorns. The thorns of Duranta bear small leaves.