Abstract

A new species of Paramongaia, P. multiflora, and of Rauhia, R. albescens, are described from Peru. We also present an updated parsimony analysis of aligned ITS sequences across the tetraploid Andean clade of Amaryllidaceae subfam. Amaryllidoideae that places both the new species and the only other species known of Paramongaia into a clade within the tribe Clinantheae with three erstwhile species of Clinanthus. We propose an expanded concept of the genus Paramongaia, conserved over Callithauma, for all five species, provide a neotype for Paramongaia viridiflora, and make the necessary combinations in the genus. Paramongaia is morphologically delimited from Clinanthus by the erect, uniformly glaucous leaves, the fusion of the spathe bracts on one side or proximally, the short pedicels, and the insertion of the free filaments below the rim of the staminal corona. A key to the species of Paramongaia is provided. We additionally present some taxonomic notes for the genus Stenomesson.