Validation of the name Centaurea ×forsythiana Levier (Asteraceae)

Abstract

Two individuals morphologically intermediate between Centaurea horrida Badarò (1824: 367) and C. filiformis Viviani (1825: 6) were collected by Charles Immanuel Forsyth Major on 26 May 1885 at Tavolara Islet, Italy (FI!): these samples were published by Fiori (1904) and later reported in Arrigoni (1972) as two different hybrids: “C. superfiliformis × horrida Levier” and “C. superhorrida × filiformis Levier”. As annotated on the label by Emile Levier, the material deposited in FI shows that the morphology of the two hybrids is very different and only the one named by Fiori as “C. superfiliformis × horrida Levier” was labelled as C. forsythiana Levier (Fig. 1). This sample is morphologically similar to the individuals of a hybrid population we discovered in the same site in the Tavolara Islet (Timone), on limestone, as reported by Fiori (1904). The hybrid named “C. superhorrida × filiformis Levier” by Fiori (1904) was collected by Forsyth Major in a different site (Bocchetta) on granite, and has never been recollected afterwards. For the matter of this note, this is not a problem since, according to Article H.4.1 of the International Code of Nomenclature (McNeill et al. 2012), all the hybrid variants originated from the same parental species, as far as considered nothotaxa (Art. H.3.1), should bear the same name.

The role of parental and hybrid species in multiple introgression events: evidence of homoploid hybrid speciation inCentaurea(Cardueae, Asteraceae)

“…A), where populations of two Sardinian narrow endemics coexist, namely, C. horrida Badarò and C. filiformis Viv., both threatened species (Bacchetta, Farris & Pontecorvo, ). Previously, in 1885, two individuals of intermediate morphology between C. horrida and C. filiformis were collected by Levier on Tavolara and described as C. × forsythiana Levier (Fiori, ; Filigheddu et al ., ).…”

Is population genetic structure of vascular plants shaped more by ecological or geographic factors? A study case on the Mediterranean endemic Centaurea filiformis (Asteraceae)

“…; Filigheddu et al . ; Mameli et al . ), when the presence of hybrid plants was inferred by the presence of shared alleles and intermediate values of genetic differentiation for five SSR loci, all of which have also been used in this study.…”

Islands as a crossroad of evolutionary lineages: A case study of Centaurea sect. Centaurea (Compositae) from Sardinia (Mediterranean Basin)

“…It grows on granitic soils and is known only from the type locality. Finally, the nothospecies C. ×forsythiana is a long-established homoploid hybrid between C. filiformis and C. horrida from the Tavolara islet [42].…”