Cortinarius ainsworthii is a newly described toadstool which grows on chalky soil. It was discovered in Devil’s Dyke in 2017 by the eponymous mycologist A. Martyn Ainsworth (Kew) and reported earlier this year in Hyde, K.D., Dong, Y., Phookamsak, R. et al. Fungal diversity notes 1151–1276: taxonomic and phylogenetic contributions on genera and species of fungal taxa. Fungal Diversity 100, 5–277 (2020). No word as to toxicity.