On the type of Coprinus giganteoporus
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Original description
Coprinus giganteoporus Huijsman in Fungus 25: 19 + fig. 1955 (Observations on Agarics). Holotype: Netherlands: prov. Gelderland, Doetinchem, 'Slangenburg', 27 June 1954, Mrs. van Vuure, on old leaves of Fagus (L).

Pileus 20 mm alto, statu inexplanato 18 mm lato, glandiformi, fisso-plicato, subtiliter albo-flocculoso vel glabro, margine pallide cinereo, parte intermedia conireo-ochraceo vel cinereo- brunneo, centro ochraceo- brunneo, aetate obscuriore, explanato, deliquescenti, margine revoluto-lacerato; carne tenui, fragili, inodora. Lammellis confertissimis, liberis, subventricosis, 3-4 mm latis, atris, acie pallidioribus. Stipite maxime 70 mm longo, 3,5 mm crasso, subaequali, tubuloso, fragili, leviter flocculoso dein glabro, peronato-fibrilloso,albo. Sporis in cumulo atris, 8,6-10,2 x 5,8-6,8 µm, submitriformibus, conspecte verrucosus, poro apiculi permagno, 2,5-3,5 µm lato; basidiis tetrasterigmatibus; cheilocystidiis 25-40 x 20 µm, vesucilosis, pleurocystidiis sparsis; hyphis superficialibus pilei radialiter dispositus; hyphis floccorumk pilei ramificatis, 4-6 µm latis; hyphis fibuligeris.

Observations:
Spores [20,1,1] 9.2--10.3 x 6.4--6.9 µm, very dark red-brown, amygdaloid, warty; Q= 1.40--1.55, av. Q= 1.45; av. L= 9.8, av. B= 6.7 µm. Germ pore central. Basidia 4-spored, surrounded by 4--5 pseudoparaphyses.
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