Tricholoma (sect. Caligata)

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
Published as part of 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, pp. 22-30 in Phytotaxa 549 (1) on page 28, DOI: 10.11646/phytotaxa.549.1.2, http://zenodo.org/record/6605290