Uncaria tomentosa
 Uncaria tomentosa (popularly known in English as cat's claw although that name is also used for various other plants; in Spanish as uña de gato or as Indian name vilcacora) is a woody vine found in the tropical jungles of South and Central America which derives its name from its claw-shaped thorns. It is used as an alternative medicine in the treatment of a variety of ailments. Other common names include: hawk's claw pot hook and sparrowhawk nail.[citation needed]