Artemisia angustissima Nakai (original description)
Artemisia fauriei Nakai (original description)
Artemisia hallaisanensis Nakai (original description)
Cacalia ameristophylla Nakai accepted as Crepidiastrum ameristophyllum (Nakai) Nakai (original description)
Cacalia chokaiensis Kudô accepted as Parasenecio hastatus var. chokaiensis (Kudô) H.Koyama (original description)
Cacalia crepidifolia Nakai accepted as Dendrocacalia crepidifolia (Nakai) Nakai (original description)
Cacalia matsumuraeana Kudô (original description)
Cacalia pseudotaimingasa Nakai accepted as Koyamacalia pseudotaimingasa (Nakai) H.Rob. & Brettell (original description)
Carpesium glossophylloides Nakai accepted as Carpesium cernuum L. (original description)
Cirsium mokchangense Nakai (original description)
Cirsium riparium (Koidz.) Koidz. accepted as Cirsium yezoense (Maxim.) Makino (original description)
Cyathocephalum Nakai accepted as Ligularia Cass. (original description)
Cyathocephalum angustum Nakai accepted as Ligularia angusta (Nakai) Kitam. (original description)
Cyathocephalum schmidtii (Maxim.) Nakai accepted as Ligularia schmidtii (Maxim.) Makino (original description)
Ligularia coreana Nakai (original description)
Saussurea conandrifolia Nakai (original description)
Saussurea franchetii Koidz. (original description)
Saussurea grandifolia var. macrolepis Koidz. (original description)
Saussurea grandifolia var. nikoensis Koidz. (original description)
Saussurea hoasii Nakai (original description)
Saussurea imperialis Koidz. accepted as Saussurea yanagisawae Takeda (original description)
Saussurea matsumurae Nakai accepted as Saussurea mongolica (Franch.) Franch. (original description)
Saussurea nambuana Koidz. (original description)
Saussurea pennata Koidz. (original description)
Saussurea sinuatoides Nakai (original description)
Saussurea stenolepis Nakai (original description)
Saussurea tanakae var. sessiliflora Koidz. accepted as Saussurea nikoensis var. sessiliflora (Koidz.) Kitam. (original description)
Saussurea uchiyamana Nakai (original description)
Senecio imaii Nakai accepted as Tephroseris subdentata (Bunge) Holub (original description)
Taraxacum hallaisanense Nakai (original description)