4. Arcyria cinerea (Bull.) Pers., Syn. meth. fung. 1: 184 (1801)

Specimens examined. PERU. Ancash: Carhuaz, Shilla, Huascaran N.P., route AN-107, km 25, park entrance, 3704 m, 9º10′06.5”S, 77º34′57.2”W, 21 Apr 2013, leaves of Tillandsia sp., Lado 23049 (MA-Fungi 95213). Huari, Huantar, Succha, ctra. PE-14A a Huantar, 3 km at the junction of route AN-110., 3064 m, 9°27′01”S, 77°11′03”W, 13 May 2018, on vegetable debris (mc, 15 Dec 2018, pH 6), Treviño Myx 620 (HSP). Yungay, Yungay, Huascaran N.P., Llanganuco sector, Chinancocha lagoon, route AN-106, km 25,500, 3844 m, 9º04′41.6”S, 77º39′06.9”W, 19 Apr 2013, branches of Polylepis sp., Lado 22928 (MA-Fungi 95133). Ayacucho: Huamanga, Acocro, route PE-3S, km 447, Sachabamba, 4183 m, 13º24′05”S, 74º03′41”W, 21 Apr 2017, stem of Puya raimondii, Lado 24931 (MAFungi 96130), Lado 24935b (MA-Fungi 96134), Lado 24939 (MA-Fungi 96137, USM). Cajamarca: Cajamarca, route PE-08, km 161, Abra Gavilán, 3187 m, 7º14′53.4”S, 78º28′13.5”W, 15 Apr 2013, leaves of Cortaderia sp., Lado 22574 (MA-Fungi 94918). Huancavelica: Angaraes, Julcamarca, route PE-26B, km 146, Julcamarca, 3400 m, 13º01′52”S, 74º25′56”W, 22 Apr 2017, leaf litter and stems of Alnus acuminata, Lado 25031 (MA-Fungi 96225). Hauytara, Pilpichaca, route PE-28A, km 208, 10 km west of Licapa, 4020 m, 13º24′18”S, 74º53′54”W, 23 Apr 2017, stem of Puya raimondii, Lado 25116 (MA-Fungi 96304). Huancavelica, Acoria, route PE-26, km 39, Ccaccasiri, 3875 m, 12º38′32”S, 74º55′06”W, 25 Apr 2017, leaves, bark and twigs of Polylepis racemosa, Lado 25227 (MA-Fungi 96411). Tayacaja, Acraquia, route PE-3SD, km 30, 6 km northeast of Pampas, 3608 m, 12º22′40”S, 74º54′27”W, 26 Apr 2017, twigs, Lado 25286 (MA-Fungi 96445), Lado 25288 (MA-Fungi 96447). Junin: Huancayo, El Tambo, route 108, km 17, 1 km southwest of Acopalca, 3790 m, 11º59′38”S, 75º06′49”W, 27 Apr 2017, leaves of Puya sp., Lado 25368 (MA-Fungi 96531), Lado 25369 (MA-Fungi 96532), Lado 25383 (MA-Fungi 96544). Yauli, Paccha, La Oroya, route PE-3N, km 6, 6 km north of La Oroya, 3706 m, 11º29′29”S, 75º56′36”W, 1 May 2017, leaves and bark Polylepis racemosa and grasses, Lado 25660 (MA-Fungi 96818), leaves of Cortaderia jubata, Lado 25688 (MA-Fungi 96846), Lado 25697 (MA-Fungi 96854). Puno: San Román, Cabanilla, ctra. PE-34A, km 253, 15 km east of Santa Lucía, 3950 m, 15°39′55” S, 70°28′43” W, 8 Oct 2012, Azorella diapensioides leaf bases, (mc, 12 Feb 2013, pH 6.04), dwb 3552.