‘Maig Moon Dong(麥問冬)’ is one of the chinese crude drugs used mainly to cure a cough and sputum, etc. With regard to the botanical origin of ‘Maig Moon Dong’, it has been considered to be Liriope species of Liliaceae, but there has not been studied pharmacognostically. To clarify the botanical origin of Maig Moon Dong, we studied on the anatomical characteristics of Liriope and Ophiopogon species growing wild in Korea i.e. L. platyphylla, L. spicata, O. jaburan, O. japonicus and Maig Moon Dong from Korea. As a result, the botanical origin of Maig Moon Dong from Korea was proved as Liriope platyphylla and L. spicata.