The distinctness of the two subgenera recognised by Widder within Leontodon on morphological grounds gains strong support from recent molecular systematic studies. The new results make it mandatory to recognise these two taxa as separate genera, because Leontodon as traditionally defined, comprising them both but excluding Picris, Hypochaeris and related smaller genera, would be diphyletic. By consequence, a fair number of former Leontodon taxa must now be placed in the genus Scorzoneroides. In order to draw the attention of practising botanists to this need and to enable them to use the names believed to be correct, a preliminary nomenclatural synopsis is given here, limited to the species and subspecies known to occur in the Euro-Mediterranean area. Required combinations that do not yet exist are validated.
- G. Bentham 1873: Compositae. — Pp. 163–553 in: G. Bentham & J. D. Hooker , Genera plantarum 2: 163–553. — London. Google Scholar
- J. Holub 1977a: New names in Phanerogamae 5. — Folia Geobot. Phytotax. 12: 293–311. Google Scholar
- J. Holub 1977b: New names in Phanerogamae 6. — Folia Geobot. Phytotax. 12: 417–432. Google Scholar
- F. A. Stafleu , C. E. B. Bonner , R. McVaugh , R. D. Meikle , R. C. Rollins , R. Ross , J. M. Schopf , G. M. Schulze , R. de Vilmorin & E. G. Voss (ed. ) 1972: International code of botanical nomenclature adopted by the Eleventh International Botanical Congress Seattle, August 1969. — Regnum Veg. 82. Google Scholar
- F. J. Widder 1931: Beiträge zur Kenntnis der Gattung Leontodon II. Die “nickenden Knospen” einiger Leontodon-Arten in ihrer Bedeutung für das System der Gattung. — Österr. Bot. Z. 80: 136–148. Google Scholar
- F. J. Widder 1975: Die Gliederung der Gattung Leontodon. — Phyton (Horn) 17: 23–29. Google Scholar