Two new species of Hortiboletus (Boletaceae, Boletales) from China

Two new species of Hortiboletus (Boletaceae, Boletales), viz. H. arduinus and H. napaeus, are described based on morphological and molecular data. Detailed descriptions, color photographs of fresh basidiomata, and line drawings of microscopic features of the two new taxa are presented. In addition, a key to all known species of Hortiboletus in the world is provided.