Physarum psittacinum Ditmar, 1817

Treviño-Zevallos, Italo, García-Cunchillos, Iván, Basanta, Diana Wrigley De & Lado, Carlos, 2023, Diversity of Myxomycetes from Peru Part III: The high Andes and the altiplano, Phytotaxa 624 (1), pp. 1-92 : 71

142. Physarum psittacinum Ditmar , in Sturm, Deutschl. Fl., Abt. 3, Die Pilze Deutschlands 1(4): 125 (1817)

Specimens examined. PERU. Ancash: Huaraz, Independencia, Huaraz , trail to Llaca lagoon, km 1 at the junction to route AN-139, km 15, 3826 m, 9º28′54”S, 77º28′01”W, 9 May 2018, leaves of Nordenstamia longystila, Lado 26139b (MA-Fungi 96944). Recuay, route AN-110, km 25, 42 km southeast of Chavín , 4060 m, 9º42′29”S, 77º17′48”W, 22 May 2014, leaves of Calamagrostis sp. , Lado 23763 (MA-Fungi 95415). Yungay, Yungay, Huascaran N.P., Llanganuco sector, Orconcocha lagoon, route AN-106, km 35,500, 3871 m, 9º03′52.0”S, 77º38′06.1”W, 19 Apr 2013, bark of Polylepis sp. , Lado 22886 (MA-Fungi 95089) . Arequipa: Arequipa, Chiguata, route PE-34C, 31 km east of Chiguata , 4075 m, 16º23′18.1”S, 71º18′59.9”W, 10 Oct 2012, trunk of Senecio sp. , Lado 22319a (MA-Fungi 94849, USM) . Ayacucho: Huamanga, Vinchos, route PE-28B, km 296, Casacancha , 4 km north of Arizona , 3451 m, 13º17′39”S, 74º19′29”W, 23 Apr 2017, branches of Baccharis sp. , Lado 25064 (MA-Fungi 96252) .

Notes. Recognized by an iridescent peridium with lime particles and yellow stalk, it differs from the typical form by the spore ornamentation, lacking prominent warts, and, sometimes, with more scattered warts, such as in collection Lado 22319. Besides, other specimens show whitish lime particles over peridium, although these are orange in the typical form.