Aconitum pilipes is re-established as a separate species closely related to A. variegatum and A. degenii; its morphological differences, geographical distribution and chromosome number (2n = 16) are given, and the name A. pilipes is neotypified. By evidence from extensive studies of plants in the field and in cultivation, fertile hybrids of A. pilipes with A. variegatum and A. degenii, i. e. A. xaustriacum and A. xpilosiusculum, the latter name being neotypified, as well as sterile hybrids with A. napellus and A. tauricum are identified, and their morphological features and geographical distribution are presented.