Three new Russula species in sect. Ingratae (Russulales, Basidiomycota) from southern China

Abstract

Three new species of Russulasection Ingratae, found in Guizhou and Jiangsu Provinces, southern China, are proposed: R. straminella, R. subpectinatoides and R. succinea. Photographs, line drawings and detailed morphological descriptions for these species are provided with comparisons against closely-related taxa. Phylogenetic analysis of the internal transcribed spacer (ITS) region supported the recognition of these specimens as new species. Additionally, R. indocatillus is reported for the first time from China and morphological and phylogenetic data are provided for the Chinese specimens.

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

“…ex F. Rudolphi, Rosaceae Juss., and Sterculiaceae (Candolle) Bartling ( Das et al, 2013 ; Dutta et al, 2015 ; Zhao et al, 2015 ; Crous et al, 2017 ; Chen et al, 2021b ). In China, together with our two new species, the vast majority of species of the subgenus such as R. albolutea , R. clavulus , R. fusiformata , R. lotus , R. luofuensis , R. subbubalina , R. subpunctipes , and R. viridirubrolimbata are associated with trees of Fagaceae ( Ying, 1983 ; Li and Deng, 2018 ; Song et al, 2020 ; Chen et al, 2021a , b , d ; Song, 2022 ); a great number of species including R. atroaeruginea , R. indocatillus , R. multilamellula , R. pseudopectinatoides , R. straminella , R. subpectinatoides , and R. succinea are associated with trees of Pinaceae ( Li et al, 2013 , 2015 , 2021 ; Chen et al, 2021d ); R. hainanensis is associated with trees of Dipterocarpaceae ( Han et al, 2022 ); some species, e.g., R. indocatillus A. Ghosh, K. Das, and R. P. Bhatt, can be associated with both trees of Fagaceae and Pinaceae ( Ghosh et al, 2020 ; Li et al, 2021 ). In addition, we also noted that R. subpunicea was reported to grow under trees of Betulaceae and Fagaceae ( Chen et al, 2021b ), and R. nigrovirens was found under trees of Ericaceae, Pinaceae, and Rosaceae ( Zhao et al, 2015 ).…”

“…Morphological characteristics used to define species of subg. Heterophyllidiae have been extensively discussed in previous studies (Chou and Wang, 2005;Li et al, 2013Li et al, , 2015Li et al, , 2019Li et al, , 2021Chen et al, 2014Chen et al, , 2019Chen et al, , 2021aZhao et al, 2015;Zhang et al, 2017;Li and Deng, 2018;Song et al, 2018aSong et al, ,b, 2020Wang et al, 2019;Yuan et al, 2019;Han et al, 2022;Song, 2022). Ecological preference, also a useful feature to delimitate species, receives little attention.…”

“…In China, 38 species of subg. Heterophyllidiae have also been described/reported, which greatly enriched the species diversity of this subgenus ( Ying, 1983 ; Chou and Wang, 2005 ; Li et al, 2013 , 2015 , 2018 , 2019 , 2021 ; Chen et al, 2014 , 2019 , 2021a , b , c , d ; Zhao et al, 2015 ; Zhang et al, 2017 ; Li and Deng, 2018 ; Song et al, 2018a , b , 2020 ; Wang et al, 2019 ; Yuan et al, 2019 ; Han et al, 2022 ; Song, 2022 ). Even so, the diversity and taxonomy still remained incompletely understood in the country.…”

“…In previous studies, about 161 species within subg. Heterophyllidiae were revealed around the world ( Ying, 1983 ; Li et al, 2013 , 2015 , 2018 , 2019 , 2021 ; Chen et al, 2014 , 2019 , 2021a , b , c , d ; Zhao et al, 2015 ; Zhang et al, 2017 ; Li and Deng, 2018 ; Song et al, 2018a , b , 2020 ; Wang et al, 2019 ; Yuan et al, 2019 ; Ghosh et al, 2020 ; Wisitrassameewong et al, 2020 , 2022 ; Vera et al, 2021 ; Altaf et al, 2022 ; Han et al, 2022 ; Song, 2022 ). Moreover, the edibility and poisonousness of the subgenus have also been noted, e.g., edible species, R. maguanensis J. Wang, X. H. Wang, Buyck and T. Bau, R. substriata J. Wang, X. H. Wang, Buyck and T. Bau, R. vesca Fr., and R. viridirubrolimbata J.…”

Two new species of Russula subgenus Heterophyllidia (Russulaceae, Russulales) from Yanshan Mountains, North China

“…In the last 10 years, 59 new species European Journal of Taxonomy 861: 185-202 (2023) of Russula have been described worldwide. Of them, 31 species belong to the subgenus Heterophyllidia (Li et al 2013(Li et al , 2018(Li et al , 2020(Li et al , 2021a(Li et al , 2021bHyde et al 2019;Deng et al 2020;Song et al 2020Song et al , 2021Song et al , 2022Zhou et al 2020;Chen et al 2021aChen et al , 2021bChen et al , 2021cChen et al , 2022.…”