Horsebrier is a type of plant with prickly stems and leaves that resembles a thorny vine. It is also known as briar horseweed, horse thistle, or horse nettle. Horsebrier is a member of the nightshade family and is native to North America. In some regions, it is considered a noxious weed due to its tendency to spread and choke out native vegetation. Synonyms for horsebrier include devil's nettle, bull nettle, Carolina nettle, sandburr, and spiny horseweed. These names reflect the plant's prickly nature and its reputation as a nuisance in some areas where it grows.