Key to the Lepiota species from China 1. Background and lamellae white tone .................................................................................................................................................2 1. Background and lamellae yellow tone .............................................................................................................................................14 2. Pileus surface with pinkish tinge suqamules at the disk.................................................................................... L. catenariocystidiata 2. Pileus surface with brown-toned suqamules at the disk.....................................................................................................................3 3. Pileipellis a hymeniform.....................................................................................................................................................................4 3. Pileipellis a trichodermium.................................................................................................................................................................5 4. Basidiospores truncate or subtriangular ........................................................................................................................ L. cristatanea 4. Basidiospores ellipsoid to narrowly ellipsoid...................................................................................................... L. atrobrunneodisca 5. Clamp connections absent in basidiocarp................................................................................................................... L. furfuraceipes 5. Clamp connections present in basidiocarp .........................................................................................................................................6 6. Basidiospores non-dextrinoid, not metachromatic in cresyl blue ................................................................................ L. subcastanea 6. Basidiospores dextrinoid, not metachromatic in cresyl blue..............................................................................................................7 7. Cheilocystidia absent......................................................................................................................................... L. brunneosqualulosa 7. Cheilocystidia present ........................................................................................................................................................................8 8. Lamellae free to subfree, moderately crowded, denticulate.............................................................................................. L. venenata 8. Lamellae free, moderately crowded, plane.........................................................................................................................................9 9. Pileus with sulcate striations ............................................................................................................................................................10 9. Pileus without sulcate striations .......................................................................................................................................................11 10. Pileus with yellowish brown, reddish brown to dark brown squamules; stipe surface covered by reddish brown squamules at base ................................................................................................................................................................................. L. amplicystidiata 10. Pileus with brownish yellow to yellowish brown squamules; stipe surface covered by whitish to grayish orange squamules at lower part..................................................................................................................................................................................... L. attenuate 11. Basidiomata medium-sized to big; pileus 40–90 mm in diam ................................................................................ L. nigrosquamosa 11. Basidiomata slender, small-sized; pileus 10–40 mm in diam ..........................................................................................................12 12. Basidiospores subtriangular............................................................................................................................................ L. mandarina 12. Basidiospores ellipsoid or ellipsoid to oblong..................................................................................................................................13 13. Pileus with brownish orange, light brown to dark brown squamules; basidiospores 6–7 × 4–5 μm ................... L. angusticystidiata 13. Pileus with brown to reddish brown suqamules; basidiospores 9–12 × 6–8 μm.................................................... L. pallidiochracea 14. Pileus surface with yellowish-brown granular pyramidal ........................................................................................... L. omninoflava 14. Pileus surface with brown aggregated fibrillose scales................................................................................................. L. baiyunensis

Published as part of Liang, Ying-Shan, Xu, Yi-Wen, Ouyang, Min, Huang, Xiao-Xia, Lin, Zhi-Jun & Qiu, Li-Hong, 2023, Lepiota baiyunensis sp. nov. (Agaricales, Agaricaceae) from Baiyun Mountain, China, pp. 1-15 in Phytotaxa 606 (1) on page 12, DOI: 10.11646/phytotaxa.606.1.1, http://zenodo.org/record/8202270