New combinations in Zostera (Zosteraceae)

Abstract

Systematic studies have clarified interspecific relationships in Zostera, but also allow for different but phylogenetically compatible classifications. Recently, several new species have been assigned to the genus Heterozostera, which some prefer to retain as a subgenus within Zostera; thus, if this taxonomic interpretation is followed, appropriate names do not exist in Zostera. To address this problem, we provide three new combinations (Zostera chilensis, Z. nigricaulis and Z. polychlamys) for species from Chile and Australia, that have been described in Heterozostera. We also present a brief account of the conflicting classifications available for Zosteraceae. © 2009 Royal Botanic Gardens and Domain Trust.