Coprinellus flocculosus (DC.) Vilgalys, Hopple & Jacq. Johnson 2001
in Taxon 50 (1): 233

MycoBank: 474358
Basionym: Agaricus flocculosus DC. 1815 in Flore française 6: 45
Original diagnosis:
"Son pédicule est blanc, long de 15 lignes, épais de 3 à 4, creux, cylindrique, sasns collier, sortant d'une volva fugace, laissant sur le chaupeau de petites houppes blanches, nombreuses, éparses sur toute sa superficie; le chapeau es hémisphérique, strié en-dessus, d'un gris cendré sur les bords, un peu roux au milieu; les feuillets sont nombreux, non adhérens, réguliers, d'un violet tirant sur le brun, puis sur le noir. Il croit en biver, solitaire, sur la terre, dans le jardin des plantes de Montpellier."
Important synonyms:
Coprinus flocculosus (DC.) Fr. 1838 in Epicrisis Systematis Mycologici: 245
Coprinus rostrupianus E.C. Hansen ss. Lange

Select. descript.: Bender & Enderle (1988): 51f. (as Coprinus flocculosus), Breitenbach & Kränzlin (1995): 234 (as Coprinus flocculosus), Dähncke (2004): 549 (as Coprinus flocculosus), Enderle (1992): 7ff. (as Coprinus flocculosus), Enderle (2004): 394 (Zeichnung der Mikromerkmale, als Coprinus flocculosus), Gerhardt (1998): 348 (as Coprinus flocculosus), Iglesias & al. (2015): 104f., Ludwig (2007): 213 (as Coprinus flocculosus), Reid (1958): 429f. + 428, fig. 12 (as Coprinus flocculosus), Ruiz Mateo (2013a): 5f., Sammler (1998): 94 (as Coprinus flocculosus)
Select. icons: Bender & Enderle (1988): before page 49 (as Coprinus flocculosus), Breitenbach & Kränzlin (1995): 235 (as Coprinus flocculosus), Dähncke (2004): 549 (as Coprinus flocculosus), Enderle (1992): 8 (as Coprinus flocculosus), Enderle (2004): 394 (as Coprinus flocculosus), Gerhardt (1998): 349 (as Coprinus flocculosus), Iglesias & al. (2015): 104, Krieglsteiner & Gminder (2010): 555 (as Coprinus flocculosus), Ludwig (2007a): 82 (as Coprinus flocculosus), Montag (2010): 50, Ruiz Mateo (2013a): 5

Macrocharacters:
Pileus: Young sickle-shaped to blunt conical, up to 60 mm wide spreading, furrowed, cream, ochraceous, brown, graying later, young denseley covered with white to brownish veil flakes or patches, which are in humid conditions perishable, but relatively persistent in dry weather.
Lamellae: Close, young whitish, black deliquescent, edge white.
Stipe: 20-100 x 2-10 mm, white, hardly pruinose, base somewhat enlarged and slightly tomentose, sometimes with a volva-lika zone.
Microcharacters:
Spores: (9,5-) 11-17,5 x (5-) 6,5-10 µm, av. 11,6-15,9 x 8,2-7,8 µm, Q av.=1,87-2,04, frontally ellipsoid to slightly ovoid, laterally somewhat flattened, apikally not infrequently prolonged (see 02.11.10), germ pore very large and highly eccentrical. Black brown, opaque.
Basidia: 23-38 x 12,-23,5 µm, 4-spored, rarely 2- or 1-spored, surrounded by 4-7 pseudoparaphyses.
Cheilocystidia: 16,5-120 µm long, sphaeropedunculate, clavate, utriform.
Pleurocystidia: 70-130 x 45 µm, ellipsoid, utriform.
Veil: Mixed of subglobose, colorless cells with 22-60 µm in diam., and chains of cylindrical to subglobose cells, 10-35,5 x 9-15 µm, hyaline or brownish pigmented, sometimes encrusted.
Clamps: Absent.
Coll. exam.:
(G) Saxony: Kyhna, 08.04.04, pieces of wood (AM360); 11.07.08, pieces of wood (no voucher); - Delitzsch, 06.05.04, pieces of wood (AM359); 06.07.13, wayside in a forest, nearly naked soil (AM1602); - Chemnitz, 29.04.14, pieces of wood, leg. B. Mühler (AM1667); - Saxony-Anhalt: Querfurt, 08.08.14, dead parts of Malva (AM1677); - Nordrhein-Westfalen: Holzhausen near Bochum, 20.11.10, leg. D. Wieschollek (AM1453).