Notes on four species of Russula subgenus Heterophyllidiae (Russulaceae, Russulales) from southern China

Abstract

Heterophyllidiae, one of the main subgenus of Russula (Russulaceae, Russulales), is both ecologically and economically important. Although many studies have focused on subgenus Heterophyllidiae in China, the diversity, taxonomy, and molecular phylogeny still remained incompletely understood. In the present study, two new species, R. discoidea and R. niveopicta, and two known taxa, R. xanthovirens and R. subatropurpurea, were described based on morphology and molecular phylogenetic analyses of ITS and 28S DNA sequences with new collections of subgenus Heterophyllidiae from southern China. Both morphological and phylogenetic analyses consistently confirmed that R. niveopicta and R. xanthovirens belong to the subsect. Virescentinae, R. discoidea and R. subatropurpurea come under subsect. Heterophyllae, and R. prasina is synonymized with R. xanthovirens.

Taxonomic and phylogenetic evidence reveal two new Russula species (Russulaceae, Russulales) from northern Thailand

“…Approximately, 163 species in the Russula subg. Heterophyllidia have been discovered all over the world (Han et al 2023). Russula subg.…”