Brier bush is a woody perennial plant that belongs to the rose family and has prickly stems and leaves. The term brier bush is often used interchangeably with several other names, such as thorn bush, bramble, briar, and prickly bush. These names refer to any plant that has thorns, spikes, or prickly hairs covering its stems and leaves. Although brier bush is commonly associated with roses, it can also refer to blackberry bushes, hawthorn trees, and other woody shrubs. Due to its thorny nature, brier bushes are often used as barriers and fences in gardens and landscapes.