AP BIOLOGY

Detailed explanation-1: -Plants which have hard woody stems and branches close to the ground are called shrubs. For e.g. china rose, camellia etc.

Detailed explanation-2: -Among woody stems, families such as Leguminosae, Rubiaceae, Euphorbiaceae, and Myristicaceae are nearly always among the most species-rich at a lowland tropical rainforest site.

Detailed explanation-3: -Woody plants are perennials (plants that live more than two years) that create stiff structures above ground that they use throughout their lives. They may be divided into three groups: trees, shrubs and vines. Trees and shrubs are self-supporting.