Tricholoma sect. Caligata

Zhao, Zhen-Xi, Song, Jia-Ge, Senanayake, Indunil C., Wu, Dong-Sheng, Wang, Guo-Qing & Xu, Biao, 2022, Tricholoma tianshanense sp. nov., in Tricholoma sect. Caligata from Tianshan Mountains in China evidenced by morphological characters and phylogenetic analyses, Phytotaxa 549 (1), pp. 22-30 : 28

Key to known species in Tricholoma sect. Caligata

1. Clamps present but rare ............................................................................................................................................... T. tianshanense

1. Clamps absent or not observed...........................................................................................................................................................2

2. Basidia 22–38 × 4.5–6.5 µm, narrowly clavate, mostly 2–4 sterigmata .............................................................. T. mesoamericanum

2. Basidia narrowly clavate, 4 sterigmata...............................................................................................................................................3

3. Basidiospores inamyloid ......................................................................................................................................... T. fulvocastaneum

3. Basidiospores nonamyloid or unknown .............................................................................................................................................4

4. Basidiospores 5–7.5 × 3.5–5.5 μm, white in mass, ellipsoidal to subglobose ............................................................. T. magnivelare

4. Basidiospores broadly ellipsoid..........................................................................................................................................................5

5. Odour strong, like that Inocybe corydalina , taste sweetish-bitter to bitter ...................................................................... T. caligatum

5. Odour different ...................................................................................................................................................................................6

6. Sweet citrus fruit odor and raw green bean flavor .............................................................................................................. T. colposii

6. Fragrant, distinctive............................................................................................................................................................................7

7. Pileus up to 210 mm diam, convex or broadly umbonate when young, expanding to plano-convex, at first whitish, disc and fibrils becoming ochraceous to brownish with age............................................................................................................... T. murrillianum

7. Pileus up to 100 mm diam, hemispherical to convex.........................................................................................................................8

8. Pileus surface white to pale creamy when young, brown to brownish-ochraceous with age ........................................ T. anatolicum

8. Pileus surface fibrillose-scales scales.................................................................................................................................................9

9. Lamellae emarginate, with even to somewhat eroded edges, at first whitish, with age sometimes with orange brown spots, rather close to medium spaced.......................................................................................................................................................... T. ilkkae

9. Lamellae close, straight, whitish, anastomosing ..............................................................................................................................10

10. Stipe 6–15 cm long, with a persistent but fairly inconspicuous annulus on the upper part, below the ring concolorous with the pileus, with dark brown, thin appressed scales................................................................................................................ T. dulciolens

10. Stipe 6–10 cm long, 1.2–1.6 diam, cylindrical, solid with a cottony-woolly annulus on the upper part, below the ring brown, thin appressed scales........................................................................................................................................................ T. bakamatsutake