(241) Proposal to amend Article H.11.1 by additionally allowing a combination of the name of a hybridogenous genus and a nothospecific epithet for naming a nothospecies of which the postulated or known parent species belong to different genera

Under the present wording of Art. H.11.1 International Code Nomenclature for algae, fungi, and plants (Turland & al. in Regnum Veg. 159. 2018), “The name a nothospecies which postulated or known parent species belong to different genera is combination nothogeneric with nothospecific epithet.” No other option naming such bigeneric multigeneric hybrids mentioned Code, therefore we think that restrictive rather than instructive, regardless initial intent authors this nomenclatural provision. While considering some problems taxonomy nomenclature Sorbus L. s.l. (see, e.g., Mosyakin Taxon 71: 480–481. 2022), noticed that, according as it stands now, Majovskya ×ambigua (Decne.) Sennikov Kurtto (in Memoranda Soc. Fauna Fl. Fenn. 93: 63. 2017) incorrect because not “a epithet”. The same true several names intergeneric placed by hybridogenous (see below). This conclusion further supported H.11 Ex. 1, states Heuchera ×tiarelloides Lemoine É. (the basionym ×Heucherella tiarelloides (Lemoine Lemoine) H.R. Wehrh., hybrid probably “originated from cross between garden Tiarella cordifolia L.”) incorrect. We interpret term “incorrect” used here meaning “not correctly applicable particular taxon under taxonomic concept”. Non-compliance does make illegitimate validly published. Since was considered (l.c.) be non-stabilized (but species!) Chamaemespilus alpina (Mill.) K.R. Robertson J.B. Phipps (Sorbus chamaemespilus (L.) Crantz) Aria edulis (Willd.) M. Roem. aria Crantz), its correct treatment should name, case ×Chamaearia Mezhenskyj (Netradytsiini Plodovi Kul'tury: 27. 2012 = Medik. × (Pers.) Host) epithet “ambigua”: ambigua McNeill, comb. nov. ≡ Decne. Nouv. Arch. Mus. Hist. Nat. 10: 165. 1874. As requires double generic nomenclature, species, respectively, resulted crosses. For example, those entities originated crosses taxa are (l.c.: 63; genus), while origin (hybrids) (a nothogenus). By analogy, Normeyera ×hostii (J. Jacq. ex 65), “is constant taxon” (Sennikov Kurtto, l.c.), concept genus 64) but nothogenus ×Chamariosorbus 29; Sorbus) called hostii 29). Our comments on will published separately preparation). Considering similar cases, propose following amendment H.11.1. also adding new Example based would useful illustrating proposed amendment. “H.11.1. either 1 [footnote] “1 purposes derived has evolved an hybridization event events contains one more i.e. evolutionarily stabilized although origin, regularly treated similarly non-hybrid origin; however, may contain (including ones).” “Ex. 1bis. have K. R. J. B. (for which, McNeill 72: 442-443. 2023) genus. Despite their acceptable certain treatments, e.g. if all Host belonging nothogenus.” If our adopted, definitions added Glossary. grateful Nicholas Turland (Botanischer Garten und Botanisches Museum Berlin, Freie Universität Germany) John H. Wiersema (Smithsonian Institution, Washington, D.C., U.S.A.) editing.