FRUITS | Types

Twig Morphology: Surface Features

surface features are modifications of leaves, stipules, bark, and twigs that aid in identification

Thorns	stems modified to form sharply pointed protrusions that can occur anywhere on a tree
Foliar Spines	leaves modified to form a sharply pointed protrusion that only occurs at nodes
Stipular Spines	stipules modified to form a sharply pointed protrusion that only occurs at nodes
Prickles	sharply pointed protrusions that emerge from the epidermis or cortex (bark), usually on twigs and small branches
Lenticels	small, wartlike, round patches of loosely organized corky tissue thought to provide aeration to tissues beneath

Hold cursor over photos to view species name and info

Thorns

stems modified to form sharply pointed protrusions that can occur anywhere on a tree

Foliar Spines

leaves modified to form a sharply pointed protrusion that only occurs at nodes

NO PHOTOS CURRENTLY AVAILABLE

Stipular Spines

stipules modified to form a sharply pointed protrusion that only occurs at nodes

Prickles

sharply pointed protrusions that emerge from the epidermis or cortex (bark), usually on twigs and small branches

Lenticels

small, wartlike, round patches of loosely organized corky tissue thought to provide aeration to tissues beneath

All definitions are from J. W. Hardin, D. J. Leopold, and F. M. White. (2001). Harlow & Harrar's Textbook of Dendrology. Ninth edition. McGraw Hill, New York, New York, 534 pp. ISBN: 0073661716.