New lectotypifications and new synonyms in Festuca (Poaceae, Pooideae, Loliinae) from the Central Andes

OSPINA, J.C.

Phytotaxa

Magnolia Press

Lugar: Auckland; Año: 2016 vol. 247 p. 247 - 258

New lectotypifications and new synonyms are provided as a result of a systematic study of the genus Festuca from theCentral Andes. In the Andes mountains of Argentina, Bolivia, and Chile, several species of Festuca are dominant componentsof the grasslands and high Andean steppes. Festuca circinata and F. dissitiflora occur in this area and were describedbased on morphological characters. Some authors have considered F. circinata as a valid species while others have treatedit as a synonym of F. dissitiflora, together with F. dissitiflora var. loricata , F. dissitiflora var. villipalea, and F. erecta var.aristulata. In this study, a review of the taxonomy and nomenclature of F. castilloniana, F. circinata, and F. potosiana wasperformed, and their morphological and anatomical characters were compared with F. dissitiflora. Based on morphoanatomicaland epidermal characters, this study contributes to the delimitation of F. circinata and F. dissitiflora. Nomenclatural notesand new anatomical and epidermal descriptions are included for these species. Differential characters between F. circinataand F. dissitiflora are discussed and F. circinata is restored as a valid species for Argentina. Festuca castilloniana and F.potosiana are synonymised under F. dissitiflora. Festuca dissitiflora var. loricata, F. dissitiflora var. villipalea, and F. erectavar. aristulata are excluded from the synonymy of F. dissitiflora and it is suggested that these names should be subordinateunder F. fiebrigii. Festuca stuckertii is proposed as a new synonym of F. uninodis. Lectotypes are designated for the namesF. argentinensis, F. dissitiflora, F. nemoralis and F. parodii, and second-step lectotypes are designated for the names F. circinataand F. ampliflora.