Abstract
In Korea, the crop " Wangul " had been widely cultivated since old times, and was one of the most important fiber crops. This is utilized as mats, fine pieces of knitting-work, which are made of the cortical portion of stem, and slippers, made of the medullary portion of stem. For the purpose of studying the characters and the classification of the crop, the author collected 383 varieties from all the parts of Korea, and arranged the results of the experiments which were carried out at the Chosen Government Agricultural Experitnent Station (Suwon, Kyengkwi prefecture) and the South Branch (Iri. N. Chella pref.) during l935-1943. The experiments consist of the following three parts : (I) Identification of species included in a crop named " Wangul " in Korea. (II) Investigation of characters of varieties in each species of " Wangul ". (III) Classification of varieties of each species of " Wangul" by using the experimental results obtained in ( II ). The results obtained from the studies ( I ) show that almost all varieties (382) of " Wangul " cultivated in Korea belong to Cyperus lwasakii M., and a few (3) of them to C. glomeratus L.
