(2962) Proposal to conserve the name <i>Ranunculus rionii</i> against <i>R. bauhini</i> (<i>Ranunculaceae</i>)

(2962) Ranunculus rionii Lagger in Flora 31: 50. 28 Jan 1848 [Angiosp.: Ranuncul.], nom. cons. prop. Typus: Switzerland, “Ranunculus Rionii / Sion en Valais Lagger. communicavit Buchinger”, [C. Rion] (NCY barcode NCY023996). (=) bauhini Tausch 17: 525. 7 Sep 1834, rej. Lectotypus (hic designatus): “R[anunculus]. Bauhini Tau., Ex Europa austr.”, Sieber (PRC PRC 456084). The name was proposed by (in 1834) for a member of group aquatic species Ranunculus, which is sometimes recognized as separate genus Batrachium (e.g., Gray, Nat. Arr. Brit. Pl. 2: 720. 1821; Janchen, Cat. Fl. Austr. 1(2): 195. 1958; Wang & Tamura Wu al., China 6: 431. 2001; Eichler Jeanes Wilson, Austral. 310. 2007), subgenus Seringe, Jard. 3: 48. 1849; Cook Mitt. Bot. Staatssamml. München 83. 1966; Tutin Eur., ed. 2, 1: 285. 1993; Whittemore FNA Ed. Comm., N. Amer. Mexico 130. 1997) or section Candolle, Syst. 232. 1817; Emadzade al. Taxon 59: 819. 2010; Wiegleb Phytotaxa 319: 1. 2017). (l.c.) cited two elements his protologue bauhini: the pre-Linnaean polynomial aquatilis omnino tenuifolius J. Bauh. hist. 3. p. 781. f. 2” and collection with provenance indicated “Habitat australi, unde plura specimina attulit D. Sieber.” illustration omnino” Bauhin's Historia plantarum universalis (3: 1651) shows homophyllous has only capillary leaves, small flowers short peduncles, such those that are now known under names R. trichophyllus Chaix (Pl. Vapinc.: 31. 1785) 49. 1848). single illustrated aggregate fruit conical-ovoid shape, indicates receptacle elongating fruit, character typical currently rionii. authentic specimen collected F.W. (probably one collecting trips to Italy Crete 1812 1817, respectively) recently discovered PRC. plant both fruits, have glabrous achenes receptacles elongated conical shape. undoubtedly taxonomically identical description bauhinii given consistent well. To best our knowledge, never been adopted apart from its protologue. Soon after original publication it interpreted synonym Steudel (Nomencl. Bot., 432. 1841). This view Index Kewensis (Jackson, Kew. 683. 1895). Subsequently, almost completely disappeared literature. We failed find taxonomic studies dealing well consulted floras central southern Europe. absent even most revisions monographs sect. Godron Mém. Soc. Roy. Sci. Nancy 1839: 8–41. 1840; l.c.). exception monograph (l.c. 1966: 129) where, however, listed among unclear “may refer terrestrial state either trichophyllus, peltatus”. In any case, spite extensive searching literature, we not found instance where recognized. If incorporated online databases, registered (Global Biodiversity Information Facility, https://www.gbif.org; Plants World Online, https://powo.science.kew.org; http://www.worldfloraonline.org) status (International Plant Names Index, https://www.ipni.org), while many other databases at all (including Euro+Med PlantBase, https://www.europlusmed.org, Tropicos, http://tropicos.org; accessed 5 Dec 2022). contrast, widely used name, consistently applied particular since publication. It accepted wide range publications include relevant national regional checklists Damboldt Hegi, Ill. Mitt.-Eur., 3(3): 315. 1974; Cook, l.c. 1993: 286; Dahlgren Strid Tan, Hellenica 67. 1997; Tsvelev, Vost. Evr. 10: 174. 2001, sub rionii; l.c.: 433, B. Danihelka Preslia 84: 679. 2012, rionii), (Cook, 141; Pizarro Lazaroa 15: 43. 1995; l.c.), biosystematics Evol., Suppl. 9: Bobrov 233: 106. 2015; Englmaier Neilreichia 8: 115. 2016; Prančl 90: 199. 2018; Koutecký Linn. 198: 419. 2022), distribution atlases Jalas Suominen, Atlas Europ. 219. 1989; Kaplan 91: 341. 2019), floristic papers Patzak Österr. Z. 109: 372. 1962; Wolff Bull. France 136: 235. Schwarzer Florist. Rundbr. 25: 69. 1991; Zprávy České Společn. 29: 62–64. 1995), karyological Watsonia 5: 125. Evol. 177: 201. 1991), on ecology communities Sarika-Hatzinikolaou Phytocoenologia 101, 2003; Hrivnák Csiky Thaiszia 19: 76, 2009; Lumbreras Biosyst. 145(supp1.): 118. 2011; Acta Oecol. 52: 10. 2013), biochemical Fiasson Biochem. Ecol. 328. Murat Pharmacogn. Mag. 292. 2009) various l.c.; Global International lectotypified detailed above identity confirmed (Kaplan PhytoKeys, press). recent examination type specimens revealed same species, being synonyms. Strict application priority rule would require well-established be replaced earlier bauhini, However, this example resurrection long-forgotten purely nomenclatural reasons, cause an undesirable disadvantageous change. preserve stability more than 170 years rionii, should conserved against bauhini. ZK, https://orcid.org/0000-0003-1707-7461 JP, https://orcid.org/0000-0003-4308-0824 PK, https://orcid.org/0000-0002-3455-850X grateful curators visited herbaria, who allowed us study their collections, Sébastien Bétrisey, Vincent Sonnenwyl, Jacqueline Détraz-Méroz Gregor Kozlowski information material NHMF SION, John McNeill Wiersema helpful comments manuscript. work supported grant no. 22-10464S Czech Science Foundation long-term research development project RVO 67985939 Academy Sciences.