Senecio praealtus var. borysthenicus DC. (Asteraceae) was described based on specimens from Ukraine provided by Wilibald S.J.G. von Besser (1784 -1842) and annotated by Antoni L. Andrzejowski (1785 -1868) as "Senecio borysthenicus". This taxon was previously recognized as Senecio borysthenicus (DC.) Andrz. ex Czern. and is currently accepted as Jacobaea borysthenica (DC.) B. Nord. & Greuter. A lectotype is designated for this name based on a specimen collected near the village of Kyslyakivka, Kherson Governorate (now Lymany, Mykolayiv Region, Ukraine), one of three original specimens studied by Augustin-Pyramus de Candolle (1778 -1841) and deposited in G-DC. The authorship of Senecio borysthenicus and Senecio jacobaea var. borysthenicus is also discussed.
A nomenclatural overview of the genus Sibbaldianthe (Rosaceae, tribe Potentilleae) is provided, following the recent re-circumscription of genera in subtribe Fragariinae based on molecular phylogenetic and morphological evidence. It is demonstrated that the names Potentilla orientalis and P. semiglabra were in fact published by Yuzepchuk (Juzepczuk) without Latin descriptions in 1935, not in 1934; thus, these names and the combinations based on them are invalid. New combinations are validated: Sibbaldianthe subg. Schistophyllidium (Potentilla subg. Schistophyllidium); Sibbaldianthe imbricata (Potentilla imbricata), S. moorcroftii (P. moorcroftii), S. orientalis (Schistophyllidium bifurcum subsp. orientale, P. orientalis, nom. inval.), and S. semiglabra (Schistophyllidium bifurcum subsp. semiglabrum, P. semiglabra, nom. inval.). Nomenclature, distribution patterns, and data on chromosome numbers of all recognized taxa are discussed. Lectotypes of four names are designated; data on types of other names are provided when available. As currently outlined, the genus Sibbaldianthe contains seven species: two (S. adpressa and S. sericea) in subg. Sibbaldianthe and five in subg. Schistophyllidium.
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