SPECIAL FEATURES

Tendril - coiled clawed structure that enables plants to attach to objects. Tendrils are modified leaves and stems.

Thorn - Woody, sharp-pointed stem. These can be terminal or in the axil of leaves. They are sometimes branched.

Spine - Modified leaf or leaf-parts. Cacti spines are modified leaves.

Prickle - Sharp structure that is an outgrowth of the bark or epidermis.