Aureoboletus, Pouzar, 1957

Zhang, Xu, Tian, Run, Tang, Li-Ping, Liang, Zhi-Qun, Zhang, Wen-Hao, Jiang, Shuai, Wang, Cheng-Kai & Zeng, Nian-Kai, 2022, Morphological and phylogenetic evidence reveal three new species of Aureoboletus (Boletaceae, Boletales) from China, Phytotaxa 567 (2), pp. 127-148 : 145-146

Key to accepted species of Aureoboletus known from China

1. Pores always compound .....................................................................................................................................................................2

1. Pores single or somewhat compound .................................................................................................................................................4

2. Pileal surface dry, pileipellis a trichodermium .......................................................................................................... A. nephrosporus

2. Pileal surface viscid, pileipellis an ixotrichodermium .......................................................................................................................3

3. Pileal surface reddish brown to brownish red, sometimes grayish red, basidiospores (8–)8.5–13(–14) × (4–)4.5–5.5 (–6) µm ........ ................................................................................................................................................................................. A. duplicatoporus

3. Pileal surface reddish gray to grayish red, tinged with reddish brown, basidiospores (8.5–)9–11 (–11.5) × 4–5 µm .......... A. zangii

4. Basidiospores with ornamentations....................................................................................................................................................5

4. Basidiospores smooth.........................................................................................................................................................................6

5. Pileus comparatively larger (up to 6 cm in diam.), pileal surface strongly viscid, stipe with annulus, basidiospores with longitudinal ridges, pileipellis an ixotrichodermium......................................................................................................................... A. longicollis

5. Pileus comparatively smaller (up to 1.2 cm in diam.), pileal surface dry, stipe without annulus, basidiospores with nodulose to verrucose ornamentations, pileipellis a trichodermium.................................................................................................. A. shichianus

6. Basidiospores broadly ellipsoid, ellipsoid, elongate (Qm <2.0)........................................................................................................7

6. Basidiospores cylindrical (Qm ≥ 2.0)...............................................................................................................................................12

7. Pileal surface strongly viscid ........................................................................................................................................... A. venustus

7. Pileal surface dry or slightly viscid ....................................................................................................................................................8

8. Pileal surface covered with a thin layer of white pruina when young................................................................................ A. rubellus

8. Pileal surface without white pruina ....................................................................................................................................................9

9. Pileus comparatively larger (up to 15 cm in diam.), basidiospores broadly ellipsoid (Qm <1.3) ..................................... A. clavatus

9. Pileus comparatively smaller (up to 8 cm in diam.), basidiospores ellipsoid or elongate (1.3 <Qm <2.0)....................................10

10. Pileal surface yellowish-white to pinkish-white.......................................................................................................... A. raphanaceus

10. Pileal surface brownish-orange, reddish-brown, reddish violet, orange yellow, reddish-yellow, orange to reddish-orange...........11

11. Pileal surface subtomentose, brownish-orange, reddish-brown to reddish violet................................................. A. guangdongensis

11. Pileal surface minutely tomentose or pulverous, orange yellow, reddish-yellow, orange to reddish-orange ...................................... .......................................................................................................................................................................... A. miniatoaurantiacus

12. Pileal margin with veil remnants......................................................................................................................................................13

12. Pileal margin without veil remnants.................................................................................................................................................21

13. Cystidia surface covered with a thick layer of a strongly refractive pale yellow substance ............................................................14

13. Cystidia surface without substance ..................................................................................................................................................15

14. Pileal surface with distinct reticulate ridges, chestnut-brown to rusty brown................................................................ A. thibetanus

14. Pileal surface rugosus, brownish to brown, tinged with yellowish white ....................................................................... A. viscidipes

15. Pileus comparatively larger (up to 10 cm in diam.), it is distributed in temperate regions............................................... A. mirabilis

15. Pileus comparatively smaller (up to 5 cm in diam.), it is distributed in subtropical and tropical regions .......................................16

16. Pileal context changing in color when injured .................................................................................................................................17

16. Pileal context unchanging in color when injure ...............................................................................................................................18

17. Pores somewhat compound, pileal context slightly changing to pinkish-white or pale red when injured, basidiospores (10–)11–12 × 4–5 µm ................................................................................................................................................................................ A. tenuis

17. Pores single, pileal context sometimes slightly changing to purplish pink, basidiospores (8–)8.5–10 × 4–4.5(–5) μm ..................... ....................................................................................................................................................................................... A. marroninus

18. Hyphae in pileipellis filamentous (wide of hyphae up to 8 μm) ......................................................................................................19

18. Hyphae in pileipellis slightly inflated (wide of hyphae up to 17 μm)..............................................................................................20

19. Pileus comparatively smaller (up to 1.9 cm), pileal surface brown to blackish brown............................................... A. microcarpus

19. Pileus comparatively larger (up to 3.5 cm), pileal surface brown to reddish-brown .......................................................... A. rugosus

20. Pileal surface brownish-yellow, brownish-orange, brownish-red to greyish-red, basidiospore (7–)8–10.5(–11) × (4–)4.5–5 μm ..... ................................................................................................................................................................................................. A. solus

20. Pileal surface reddish-brown, violet brown to greyish-ruby, basidiospore (9.5–)10–13.5 × (4–)4.5–5 μm ................... A. glutinosus

21. Basidiospores with Qm> 3.0............................................................................................................................................................22

21. Basidiospores with Qm <3.0............................................................................................................................................................23

22. Pileal surface brownish red to deep red, brownish red, grayish ruby to pink, basidiospore (14.5–)15–16.5 (–17) × 4.5–5 (–5.5) μm...................................................................................................................................................................................... A. formosus

22. Pileal surface pale yellow, light yellow, light orange, grayish yellow, grayish orange, brownish orange to brownish red, basidiospore (12–)15–21 × 5–6.5 μm....................................................................................................................................... A. quercus-spinosae

23. Hyphae in pileipellis filamentous (wide of hyphae up to 9 μm) .................................................................................... A. erythraeus

23. Hyphae in pileipellis slightly inflated (wide of hyphae up to 17 μm)..............................................................................................24

24. Pileus comparativelylarger (up to 10 cm in diam.) ..........................................................................................................................25

24. Pileus comparatively smaller (pileus up to 6 cm in diam.). .............................................................................................................26

25. Pileal surface violet brown, pastel red, brownish-red, reddish-brown to brownish-violet, surface of hymenophore light yellow to greenish-yellow, context slightly changing to greyish-red when injured, basidiospores 10–13(–14) × (4–)4.5–5 (–5.5) μm............. ........................................................................................................................................................................................ A. sinobadius

25. Pileal urface grayish orange to brownish orange, surface of hymenophore butter yellow to maize yellow, context unchanging in color when injured, basidiospores 9–11 × 4–5.5 μm................................................................................................... A. yunnanensis

26. Pileal context unchanging in color when injured ........................................................................................................... A. catenarius

26. Pileal context changing greyish-red, greyish-rose or pastel red when injured.................................................................................27

27. Pileal surface brownish-orange, brownish-red, dark red to greyish-ruby, basidiospores (8–)9–10.5(–11) × (4–)4.5–5(–5.5) μm...... ................................................................................................................................................................................ A. griseorufescens

27. Pileal surface light yellow, light orange, brownish-orange, brown to reddish-brown, basidiospores 10–13 × (4–)5–6(–6.5) μm...... ........................................................................................................................................................................................... A. velutipes