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.
Highlights
Russula Pers. is a widespread genus that contains at least 2000, but possibly as many as 3000 species worldwide (Li et al 2018; Adamčík et al 2019; He et al 2019)
The modern taxonomy of Russula calls for a combination of detailed microscopic observations with universal and specific standard, multi-gene phylogenetic analyses and accurate symbiotic plant species information (Buyck et al 2018; Adamčík et al 2019)
The internal transcribed spacer (ITS) phylogenetic analyses are the most common for practical identification of Russula species, because ITS is regarded as an adequate single gene DNA barcode for this genus (Li et al 2019) and it has the largest number of available referential sequences in open databases (Schoch et al 2012)
Summary
Russula Pers. is a widespread genus that contains at least 2000, but possibly as many as 3000 species worldwide (Li et al 2018; Adamčík et al 2019; He et al 2019). Is characterised by tawny, ochraceous or ashy-grey to dark brown pileus with tuberculate striate margin, acute to subacute equal lamellae, flesh with a distinct fetid, spermatic or waxy odour, or like bitter almonds, cream-coloured spore print, spores partly showing inamyloid reaction in the suprahilar area, small- to medium-sized unicellular pileocystidia and articulated and branched hyphal ends in the pileipellis (Shaffer 1972; Romagnesi 1985; Sarnari 1998) The combination of these characters makes this section one of the more distinguishable groups in the Russula subgenus Heterophyllidiae Romagn. Several field investigations have been carried out on campuses and, in parks, natural reserves and wild mushroom markets of south-western China to unveil the species diversity of sect. We report R. indocatillus as a new record for China
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
