Fungalpedia – Note 367, Butyriboletus

 

Butyriboletus D. Arora and J. L. Frank

Citation when using this data: Tibpromma et al. 2024 (in prep.) – Fungalpedia, Macrofungi.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1  

Classification: Boletaceae, Boletales, Agaricomycetidae, Agaricomycetes, Agaricomycotina, Basidiomycota, Fungi 

Butyriboletus was erected by Arora et al. (2014), typified with Butyriboletus appendiculatus and accommodated in Boletaceae. This genus  contains 29 ectomycorrhizal species found in Asia, Europe, North America, and North Africa (Zhao et al. 2015, Wang et al. 2022). However, Butyriboletus was previously classified as a section Appendiculati within the large genus Boletus. It was bestowed with the common name “butter boletes” because of the similarity in color between their stalk, flesh, and pores and that of butter (Arora et al. 2014). Butyriboletus is characterized by red or brown caps, yellow pores, and stipes, which turn blue when cut or bruised in many species. Additionally, Butyriboletus features olive-brown spindle-shaped spores and its flesh is typically mild (Arora et al. 2014). Five species have been described in China, Butyriboletus roseoflavus, a highly esteemed edible mushroom, is sold in markets in southwestern and southeastern China (Arora et al. 2014, Wang et al. 2022).

            Type species: Butyriboletus appendiculatus (Schaeffer) D. Arora & J. L. Frank

Other accepted species: Species Fungorum – search Butyriboletus

 

 

Figure 1 – Morphology of Butyriboletus. a Basidiospores. b Pleurocystidia and cheilocystidia. c Basidia and a pleurocystidium. d Pileipellis. Scale bars: a–c= 10 μm; d = 20 μm. Redrawn from Zhao et al. (2015).

 

References

Arora D, Frank JL. 2014 – Clarifying the butter boletes: a new genus, Butyriboletus, is established to accommodate Boletus sect. Appendiculati, and six new species are described. Mycologia 106(3), 464–480.

Wang Y, Tuo YL, Wu DM, Gao N. et al. 2022 – Exploring the relationships between four new species of boletoid fungi from Northern China and their related species. Journal of Fungi 8(3), 218.

Zhao K, Wu G, Halling RE, Yang ZL. 2015 – Three new combinations of Butyriboletus (Boletaceae). Phytotaxa 234(1), 51–62.

 

Entry by

Yang EF, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, China.

 

(Edited by Saowaluck Tibpromma, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)

 

Published online 14 November 2024

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