Entoloma bisporum (Hongo) Hongo, List of Fungi Recorded in Japan: 307 (2010)

IH 1 pl 66 Entoloma bispora 477 montTypus in JJB by Hongo Tsuguo Hongō
Rhodophyllus bisporus Hongo, Journal of Japanese Botany 32 (7): 212 (1957)

Entoloma bispora 1994 0430_0004 ab

Entoloma bispora 1994 0430_0003

Rhodophyllus bisporus Hongo sp. nov.

Pileo 8-15 mm lato, e convexo plano,hygrophano,glabro,pallide gilvo,centro brunneolo, toto pellucide striato in humidis, estriato et nitente in stato sicco, margine primum士incurvato ; carne tenuis, subconcolori hygrophanaque,fragili, odore subnullo, sapore miti ; lamellis adnexis (vel adnato-adnexis),ventricosis, 1-2 mm latis, distantihus vel subdistantibus (L=1 6-19; l = (1) 3( 7) ), albidis dein roseis ; stipite 1.5-2 cm longo, 1-2 mm crasso,  aequali, glabro, pileo concolori vel pallidiori, ad apicem pruinosulo, basi albo tomentoso ; sporis in cumulo carneis ; basidiis bisporis.

Microscopic characters: Spores heterodiametric, angular, 9 -10.5 x 6.5 - 7.5 μ,1- to multi-guttulate; basidia two-spored 34-40 x 6.5 - 7.5 μ; cheilo- and pleurocystidia not differentiated; hyphae dampless.

Hab. Gregarious, on humus or on much decayed wood in plantation of Chamaecγparis obtusa, Ishiyama Hiratsu-chô,Ôtsu-city,May 9, 12 (type) and 14, 1956; May 6,1957. Distr. Endemic (Ômi).

A very small spring fungus. This species is remarkable for the 2-spored basidia which are only rarely seen in the genus Rhodophyllus (e. g. R. cetratus (Fr.) Quél.)). (Subgenus : Nolanea).

Entoloma bispora 1994 0430_0006

Entoloma bispora 1994 0430_0002

Entoloma-bisporum-fig4Entoloma-bisporum-fig4.jpg
Literature: He, X.L.; Li, T.H.; Jiang, Z.D.; Shen, Y.H. 2011. Entoloma mastoideum and E. praegracile - two new species from China.

Mycotaxon. 116:413-419 Page number: 418
Remarks: Entoloma bisporum (drawn from the holotype). A: Basidiomata. B: Spores. C: Basidia. D: Pileipellis.