New Record for Alien Plant, Corchorus aestuans L. (Malvaceae) in Korea

A newly recorded species of Corchorus aestuans L. in the family Malvaceae was discovered in the farmlands of Maepo-ri, Maepo-eup, Danyang-gun, Chungcheongbuk-do and Kwan-ri, Iwon-myeon, Taean-gun, Chungcheongnam-do. The genus Corchorus L. belongs to the Malvaceae family and consists of 50-60 species, most of which are found in Africa and Australia. C. capsularis L. is important for fiber production and C. olitorius L. is important for food and medicine and is cultivated worldwide. C. aestuans can be distinguished from C. capsularis by the following characteristics: the capsule is cylindrical, the apices are forked, and the leaf blade is hairy; it is shorter (20-40 cm) and more erect or prostrate than C. olitorius; the capsule is forked at the apices, and the entire leaf blade is hairy. Its Korean name is Ae-gi-hwang-ma, and its descriptions, photographs, diagrams, and indices are provided in this study.