The species of the genus Eudesme from the China are studied. There are four species in China, Eudesme virescens (Carm.) J.Ag., Eudesme huanghaiensis Ding et Lu, E.qingdaoensis Ding et Lu and E.shandongensis Ding et Lu. Their morphological features and geographical distributions are discussed, a key to the species from China is provided. E.virescens is characterized by frond being 10-20 cm in height or more, 2-5 mm in diameter, solid in center, its subcortical cells being cylindrical or ellipsoidal. E.huanghaiensis is characterized by frond being 5-20 cm in height, 1.5-3.0 mm in diameter, solid, spherical subcortical cells and rhizoidal filaments developed from the basal cells of subcortex. E.gingdaoensis is characterized by frond being 10 cm in height, hollow in center, 2.5 mm in diameter, 90-230 μm long medullary cells, thin medullary wall, long and slender terminal cell of rhizoidal filaments. E.shandongensis is characterized by frond being 18-25 cm in height, hollow in center, 1.0-1.5 mm in diameter, 80-195 μm long medullary cells slightly thick medullary wall, spherical terminal cell of rhizoidal filaments. All specimens studied are preserved in the Herbarium of the Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.