Crocinoboletus, a new genus of Boletaceae (Boletales) with unusual boletocrocin polyene pigments Author Zeng, Nian-Kai Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China & Hainan Provincial Key Laboratory of R & D on Tropical Medicinal Plants, College of Pharmacy, Hainan Medical University, Haikou 571199, China Author Wu, Gang Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China Author Li, Yan-Chun Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China Author Liang, Zhi-Qun College of Materials and Chemistry Engineering, Hainan University, Haikou 570228, China Author Yang, Zhu L. Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China text Phytotaxa 2014 2014-08-08 175 3 133 140 http://dx.doi.org/10.11646/phytotaxa.175.3.2 journal article 10.11646/phytotaxa.175.3.2 1179-3163 5143841 Crocinoboletus N.K. Zeng, Zhu L. Yang & G. Wu , gen. nov. MycoBank: MB 809228 Etymology : “ Crocino ” refers to the presence of the boletocrocins. Basidiocarp stipitate-pileate with tubular hymenophore. Pileus 3.8–8 cm in diameter, convex to applanate, surface yellowish orange, bright orange to reddish orange, covered with minute, reddish brown squamules, turning bluish olivaceous quickly, then blackening when bruised. Hymenophore poroid, adnate or slightly depressed around apex of stipe; tubes 3–5 mm in depth, with pores 0.2–0.7 mm in diameter; orange, turning bluish olivaceous quickly, then blackening when bruised. Stipe 5–11 × 1–3 cm , centrally attached, subcylindric; surface concolorous with the pileus, covered with reddish orange squamules, turning bluish olivaceous quickly, then blackening when bruised. Context vivid golden yellow, turning bluish olivaceous quickly when bruised. Basidiospores subfusiform to ellipsoid, smooth. Pleuro- and cheilocystidia present. Pileipellis an interwoven trichoderm at the middle part of the pileus but a cutis at the margin of the pileus. Clamp connections absent. Polyene pigments boletocrocins present. Type species: Boletus rufoaureus Massee , Bulletin of Miscellaneous Information of the Royal Botanic Gardens Kew 1909: 204, 1909