Mikhovich ZH. E. RussiaСыктывкарInstitute of Biology of the Komi Science Centre of the Ural Division RAS, 28 Kommunisticheskaya st., 167982 Syktyvkar, Komi Republicmishurov@ib.komisc.ru Author's articles Свербига восточная в культуре на севере Helianthus tuberosus L. in multi-year culture in the North (Komi Republic)