Inocybe petchii Boedijn (1951: 223)

Horak, Egon, Matheny, P. Brandon, Desjardin, Dennis E. & Soytong, K., 2015, The genus Inocybe (Inocybaceae, Agaricales, Basidiomycota) in Thailand and Malaysia, Phytotaxa 230 (3), pp. 201-238 : 214-215

8. Inocybe petchii Boedijn (1951: 223)

Basionym: Inocybe umbonata Petch, Ann. R. bot. Gdns Peradenyia 6: 202, 1917 (syn. post., non Inocybe umbonata Quél., Bull. Soc. mycol. France 2: 4, 1876).

Synonym: Astrosporina petchii (Boedijn) E. Horak , Persoonia 10: 164, 1979.

Misappl.: Astrosporina gemina E. Horak , Persoonia 10: 166, 1979.

Habitat: On soil in tropical montane rain forest dominated by Castanopsis , Lithocarpus , Quercus , also in tropical dipterocarp forest.

Known distribution: Sri Lanka (type), Papua New Guinea, Malaysia.

Specimens examined: SRI LANKA. Peradenyia, Jul. 1912, leg. T. Petch 3499 (holotype, as Inocybe umbonata Petch, K ); same locality, 15 Oct. 1914, leg. T. Petch 4173 (K). PAPUA NEW GUINEA. Morobe District: Bulolo, Manki, 1400 m elev., on soil in tropical montane rain forest (dominated by Castanopsis-Lithocarpus), 25 Apr. 1972, leg. E. Horak (ZT72-408); Western Highlands: Mt Hagen, Baiyer River Forest Reserve, on soil in montane rain forest (dominated by Lithocarpus ), 22 May 1972, leg. E. Horak (ZT72-476). INDONESIA. Java: Cibodas, trail to Mt Gede, 1800 m elev., on soil in tropical montane fagalean forest, 11 Apr 1972, leg. E.J.H. Corner, J-5 (E, ZT); same locality and habitat, on soil in tropical montane fagalean forest (dominated by Castanopsis-Lithocarpus), 14 Mar 1977, leg. E. Horak (ZT77-188); same locality and habitat, on soil in tropical montane rain forest (dominated by Quercus and Castanopsis ), 30 Dec. 1998, leg. E. Horak (ZT6457); same locality and habitat, on soil in tropical montane rain forest (dominated by Quercus and Castanopsis ), 22 Jan. 1999, leg. D.E. Desjardin (DED6962, SFSU; BO99-361; ZT7331); same locality and habitat, 31 Dec. 1999, leg. E. Horak (ZT8322, BO001). MALAYSIA. Johor: Gunong Panti, 500 m elev., on soil in tropical dipterocarp forest, 7 Sep. 1930, leg. E.J.H. Corner (ZT78-44).

Notes: Inocybe petchii is probably widely distributed in southeast Asia. To date this species with eye-catching basidiomes has not been recorded in Thailand. However, its occurrence can be expected ( Horak 1980). Macroscopically, the basidiomes are similar to large specimens of I. gemina . However, these two taxa are readily distinguished by microscopical features. DNA sequence data have yet to be produced from any samples of I. petchii .