Thorn Anatomy Diagram - Botanical Illustration of Plant Defense Structures #288163 (License: Personal Use)

This botanical illustration depicts a sharp, woody thorn arising from a stem, with visible internal differentiation-vascular bundles, parenchyma, and sclerenchyma-indicating its origin as a modified stem (not a spine or prickle). The base shows a stipular or axillary origin with dotted lines suggesting tissue continuity and developmental derivation. Such structures are common in drought-adapted plants like acacias and citrus, serving both defensive and transpirational roles.

Used in botany textbooks, educational websites, and plant morphology resources to teach structural adaptations; targets students, educators, and horticulturists seeking accurate anatomical references for plant defense mechanisms.