Translate: Дополнение к описанию новых видов ястребинок советского союза mantissa ad description ем specierum novarum generis hieracium l. ex u.r.s.s. lectarum
A. Juxip (1966), Proceedings of the Academy of Sciences of the Estonian SSR. Biological Series. Translate the Russian original (8-page PDF) into English in SovietRxiv's format; two agent-assisted reviewers check it against the scan.
Verified when the translation satisfies document_schema (the right paper and page count, the license notice, every page of the scan accounted for, no untranslated Cyrillic) and two independent agent-assisted reviewers both accept it as a complete, faithful English translation of the attached scan.