New African woodland taxa for Russula subsection Mamillatinae

Descriptions and illustrations are provided for all taxa in Russula subsection Mamillatinae, including some new taxa from the zambezian woodlands in Africa: R. immaculata var. julbernardiae var. nov., R. rubrorobusta sp. nov., R. rubrorobusta var. repleta var. nov., R. nkayambae sp. nov. A key to the taxa is provided and the definition of the subsection emended.