Tricholomopsis, Singer, 1939

Mao, Ning, Xu, Yu-Yan & Fan, Li, 2021, Three new species of Tricholomopsis (incertae sedis) from North China based on morphological and molecular data, Phytotaxa 507 (2), pp. 155-166 : 163-164

Key to the known species of Tricholomopsis from China

1. Habitat with bamboo ..........................................................................................................................................................................2

1. Habitat with coniferous and broad-leaved forests, but not bamboo...................................................................................................4

2. Pileus red-brown, not orange, densely covered by scales .............................................................................................. T. bambusina

2. Pileus orange-fulvous or dark reddish orange, covered by squamules or fibrils................................................................................3

3. Pileus orange-fulvous with darker disc, covered by minute downy squamules...................................................................... T. sasae

3. Pileus dark reddish orange, densely covered by fibrils ......................................................................................... T. rubroaurantiaca

4. Lamellae pale white to white..............................................................................................................................................................5

4. Lamellae pale yellow to yellow..........................................................................................................................................................6

5. Rhizomorphs present at the base of the stipe ..................................................................................................................... T. radicata

5. Rhizomorphs absent at the base of the stipe............................................................................................................................ T. nigra

6. Pleurocystidia absent or scarce...........................................................................................................................................................7

6. Pleurocystidia abundant....................................................................................................................................................................10

7. Pileus diameter> 100 mm ..................................................................................................................................................................8

7. Pileus diameter <100 mm ..................................................................................................................................................................9

8. Pileus light orange, covered by red to purple reddish fibrous scales ................................................................................... T. galeata

8. Pileus purple red, covered by red-brown to purple-red small scales................................................................................... T. rutilans

9. Pileus reddish to bluish purple, covered by fibrils ....................................................................................................... T. lividipileata

9. Pileus pale white, covered by dark brown to black scales ...................................................................................... T. nigrosquamosa

10. Cheilocystidia filiform...................................................................................................................................................... T. flavissima

10. Cheilocystidia cylindrical to clavate, but not filiform......................................................................................................................11

11. Basidiospores cylindrical..................................................................................................................................................................12

11. Basidiospores not cylindrical ...........................................................................................................................................................13

12. Lamellae pale bronze...................................................................................................................................................... T. araucariae

12. Lamellae pale yellow.................................................................................................................................................... T. pallidolutea

13. Basidiospores subglobose.............................................................................................................................................. T. crocobapha

13. Basidiospores broadly ellipsoid, ellipsoid to oblong-ellipsoid.........................................................................................................14

14. Fibrils or scales on the surface of pileus red to violet ......................................................................................................................15

14. Fibrils or scales on surface of pileus not red to violet color.............................................................................................................17

15. Pileus diameter> 50 mm ................................................................................................................................................... T. flammula

15. Pileus diameter <50 mm ..................................................................................................................................................................16

16. Habitat with coniferous forests........................................................................................................................................ T. sanguinea

16. Habitat with broad-leaved forests.....................................................................................................................................................18

17. Pileus yellow-brown, covered by red-brown scales .............................................................................. T. bambusina var. megaspora

17. Pileus yellow, covered by purplish red squamules, denser towards centre ................................................................... T. shulanensis

18. Stipe soft pink............................................................................................................................................................ T. mitirubicunda

18. Stipe not soft pink.............................................................................................................................................................................19

19. Pileus brightly yellow to orange, covered by yellow-green, bronze, olive-brown to olive-black, distinctly upraised scales ............. ............................................................................................................................................................................................... T. decora

19. Pileus less bright, yellow to ochre, covered by yellow-ochre to orange-brown, fine to coarse, adpressed fibrils or fine scales......... ...................................................................................................................................................................................... T. sulfureoides