## 3 Results
### Taxonomy
3035 m, 15 July 2023, [PERSON] et al., 23-75751; Dali city, Cangshan National Geopark, 25\({}^{\circ}\)41\({}^{\prime}\)42.47\({}^{\prime\prime}\) N, 100\({}^{\circ}\)06\({}^{\prime}\)30.73\({}^{\prime\prime}\) E, Alt. 3075 m, 19 May 2024, [PERSON] and [PERSON], 24-76096. Sichuan Prov., Liangshan Yi Autonomous Prefecture Muli Co. 27\({}^{\circ}\)41\({}^{\prime}\)51.41\({}^{\prime\prime}\) N, 101\({}^{\circ}\)13\({}^{\prime}\)52.86\({}^{\prime\prime}\) E, Alt. 3177 m, 10 September 2021, [PERSON] et al., 21-70363, 21-70423, XY21-272, XY21-275. Qinghai Prov., Menyuan Co., 37\({}^{\circ}\)12\({}^{\prime}\)34\({}^{\prime\prime}\) N, 102\({}^{\circ}\)07\({}^{\prime}\)39\({}^{\prime\prime}\) E, Alt. 2711 m, 24 July 2022, [PERSON] et al., ZSB22-133; Manma Co., 32\({}^{\circ}\)46\({}^{\prime}\)50\({}^{\prime\prime}\) N, 101\({}^{\circ}\)11\({}^{\prime\prime}\)2\({}^{\prime\prime}\) E, Alt. 3553 m, 14 July 2022, [PERSON] et al., ZSB22-256. _Pseudosolarina saccata_ ([PERSON] [PERSON] and [PERSON], comb. nov. **Figure 9**  
_= Lichen saccatus L., Fl. Succ._, Edn 2: 419 (1755)  
_= Lobaria saccata_ ([PERSON] [PERSON], _Deutschl. Fl._, Zweiter Theil (Erlangen): 147 (1796)  
_= Peltidea saccata_ ([PERSON] [PERSON], _[PERSON]_, Sectio post. (Stockholmie): 290 (1803)  
_= Peltigera saccata_ [PERSON][PERSON], in Lamarck and de Candolle, _Fl. franc._, Edn 3 (Paris) 2: 408 (1805)  
_= Arthonia saccata_ [PERSON][PERSON], _Neues J. Bot._ 1(3. Stuck): 21 (1806)  
_= Solorina saccata_ [PERSON][PERSON], _K. Vetensk-Acad. Nya Handl._ 29: 228 (1808)  
_= Platysma saccatum_ [PERSON][PERSON] [PERSON], _Deutsch. Botan. Taschenb._ 2: 165 (1812)  
_= Solorina saccata_ [PERSON][PERSON], _Magy. Bot. Lapok_, 29: 29 (1930)  
Fungal Names: FN 572280  
Type: LINN-HL1273-197 (Lectotype, designated by [PERSON] et al., _Bot. J. Linn. Soc._ 115: 381. 1994)  
Description: Thallus: large foliage, fragile, dorsiventral, heteromerous, lobate, 3-6 cm in diam. ; Lobes: rounded, 4-20 mm; Upper surface: bright apple-green when wet, dark green to pale grey to tinged brown when dry, white-pruninose, having external cephalodia; Upper cortex: parapelecthenymatous, colorless, 50-100 \(\upmu\)m thick; Medulla: 200-350 \(\upmu\)m thick; Photobiont: _Cocomyza_ and _Nostoc_, single _Cocomyza_ green-algal layer, c. 50-110 \(\upmu\)m thick, _Nostoc_ present in external cephalodia on the upper surface and internal cephalodia which can be seen on the underside of the thallus as dark spots; Lower cortex: lacking; Lower surface: pale brown, densely tometose, not or indistinctly veined, rhizines abundant and long, up to 18 mm; Apothecia: large, rounded, irregularly scattered, sunk in depressions in the upper surface, red-brown to black, medially concave, thalline margin absent; Asci: clavate, _Peltigera_-type, 4-spored; Ascospores: red-brown or dark brown,1-septate with a median constriction, ellipsoid to fusiform, wall non-uniformly thickened, surface ornamented with broad reticulating ridges and irregular lacunae, dimensions: 32-60 \(\times\) 18-27 \(\upmu\)m.  
Chemistry: No lichen products detected by TLC. Ecology and distribution: This species grows in calcareous soil rich in humus and terrestrial mosses in a cool-temperate alpine region, often inhabiting rock crevices and also commonly found along the edges of groves. Its widespread distribution includes: Alps [52], USA [66], Canada [44], England [67], France [46], Germany [47], Greece [68], Iberian Peninsula and Balearic Islands [49], India [69], Italy [52], Japan [53], Norway [64], Poland [56], Siberia [70], the Czech Republic [59], Ukraine [60] and China. Note: _Pseudosolorina saccata_ is widely distributed and morphologically variable. _P. simensis_ and _P. bispora_ were previously classified as variants under this species. _P. saccata_ is characterized by a green upper surface, a white lower surface, a concave apothecium, and 4-sporced ascus. Notably, it closely resembles _P. parmigera_; however, distinct attributes for _P.