Secondary Growth in Woody Plants

Flashcards covering key vocabulary terms related to secondary growth in woody plants.

Woody Plants

Long-lived perennials, shrubs, and trees that exhibit secondary growth.

Secondary Growth

Growth that results in an increase in the width or girth of the plant, primarily occurring in woody plants.

Vascular Cambium

A lateral meristem that divides to produce xylem (to the inside) and phloem (to the outside).

Cork Cambium

Also known as phellogen, a lateral meristem that produces cork (phellem) and phelloderm.

Periderm

The protective outer layer of the plant, including cork, cork cambium, and phelloderm.

Bark

All tissues outside the vascular cambium, including inner bark (functional and nonfunctional phloem) and outer bark (periderm and old phloem).

Lenticels

Interruptions in the periderm that allow for gas exchange.

Tree Rings

Annual growth rings that can be counted to determine the age of a tree.

Xylem

Vascular tissue responsible for the transport of water and nutrients; produced inside the vascular cambium.

Phloem

Vascular tissue responsible for the transport of sugars and nutrients; produced outside the vascular cambium.