Typification of the name Avena laevigata, the basionym of Avenula pubescens subsp. laevigata (Poaceae)

Avena laevigata Schur (1860: 72) belongs to the taxonomically difficult group of perennial oats whose phylogenetic relationships, systematics, and nomenclature have been reconsidered many times (Holub 1958, 1962, Gervais 1973, Röser 1989, Lange 1995, Conti et al. 2005, Röser et al. 2009, Romero-Zarco 2011). It is affiliated with the generic name Avenula (Dumortier 1824: 122) Dumortier (1868: 68), a taxon accepted in the worldwide phylogenetic classification of the Poaceae (Soreng et al. 2015) and is the basionym of the accepted subspecies name Avenula pubescens (Hudson 1762: 42) Dumortier (1868: 68) subsp. laevigata (Schur) Holub (1976: 295) (Euro+Med 2006 onwards) distributed in the western and southern Alps as well as the southern and eastern Carpathians (Dixon 1991). The nomenclatural type of Avena laevigata (and so that of Avenula pubescens subsp. laevigata) is unknown, hence typification of this name is necessary (McNeill et al. 2012).