Psathyrella pannucioides

[Germ. version]
Coprinopsis pannucioides (J. E. Lange) Örstadius & E. Larss. 2008 in Myc. Research 112: 1180

MycoBank: 511723
Basionym: Hypholoma pannucioides J. E. Lange 1940 in Fl. Agar. Dan. 5: iv, 104, pl. 200 fig. H

Original diagnosis:

“HYPHOLOMA
ad 8. H. pannucioides Lange n. sp. (Plate 200. fig. H.)
Densely cespitose (often more than 30 fruit-bodies together). Cap, when expanded, 2-4 cm broad, at first almost globate campanulate, with incurved edge, then convex with a small umbo, when young very pale (brownish-alutaceous with a flush of flesh-colour), gradually becoming brownish livid gray, not pellucido-striate. Surface at first entirely covered (except at umbo) by a white, arachnoid fibrillosity, particularly dense towards the margin which originally is connected with the stem by a white, fibrillose veil. Gills at first whitish, then café au lait and at last grayish brown (edge white), rather narrow, affixed. Stem often corved, 2 - 6 x 2 ½ - 3 mm, pute white, everywhere fibrillose when young, hollow and brittle. Smell faint, fungoid.
Spores ellipsoid, about 9 – 9 ½ x 5 µ. Cystidia inflated, either bottle-shaped or vesiculose, 14 – 15 µ broad, present both on the edge and faces of gills. Basidia 4-spored. Cuticle partly made up of ovate, vesiculose cells, up to 35 µ diam., partly of fibrills, about 12 µm broad.
On boggs ground (dried-up mud from septic tank) around a stump of Fraxinus (in wood of Fraxinus), several hundred specimens covering about a square meter. Alokkeskov (Odense), September 1938.”

Important synonyms:
Drosophila pannucioides (J.E. Lange) Kühner & Romagn. 1953 in Fl. anal. Champ. sup.: 362 (inval.)
Psathyrella pannucioides (J.E. Lange) M.M. Moser 1967 in Gams, Kl. Krypt.fl. 2b/2, 2. ed.: 220
Psathyrella cuspitata A. H. Sm. 1941 in Contr. Univ. Mich. Herb. 5: 32

Select. descript.: Gröger (1984): 9 (as Psathyrella pannucioides), Kits v. Wav. (1985): 205ff. (as P. pannucioides), Ludwig (2007): 617 (as P. pannucioides), Örstadius & Knudsen (2008): 603f. (as P. pannucioides), Smith (1941): 32ff. (als P. cuspitata), (1972): 107f. (as P. cuspitata)
Select. icons: Ludwig (2007a): 184 (as Psathyrella pannucioides), Sammut & Melzer (2012): 36

Macrocharacters:
Pileus: 10-40 (-50) mm broad, conical, later spresding with umbo, grey brown to red brown, hardly striated, fading to pale brown or yellowish. Veil young very distinct but volatile.
Lamellae: Close to moderatly distant, dark brown, edge white.
Stipe: 30-70 (-100) x 2-7 mm, whitish to pale brownish, flocculose, usually with a common pseudorhiza.
Spore print: Dark red brown.

Microcharacters:
Spores: 8-12 x 5-6,5 µm, av. 9-10 x 5,1-5,6 µm, av. Q=1,70-1,90, slender ellipsoid to ovoid, germ pore 1-2 µm. In water medium to red brown, in ammonia dark brown, in KOH dirty grey brown to dark grey, not opaque.
Basidia: 16,5-35 x 8-11 µm, 4-spored.
Cheilocystidia: 22-65 (-80) x 10-16,5 (-25) µm, numerous, but often not densely crowded. Intermixed with moderately numerous clavate and spharopedunculate marginal cells, 13,5-30 x 8-20 µm.
Pleurocystidia: 35-90 x 12-25 µm, infrequently to numerous.
Clamps: Present.

Habitat: caespitose terrestrial or on wood
Distribution: Denmark, Finland, France, Germany, Hungary, Malta, Norway, Slovac Republic, Sweden, USA
Remarks:
Psathyrella pannucioides ss. A. H. Sm. is Psathyrella subpannucioides Courtec. 1985 (nom . nov., Documents Mycologiques 16(61): 49).

Coll. exam.:
(B) Kortenberg, 02.10.2017, leg. D. Deschuyteneer (AM1920); Kortenberg, 02.10.2017, leg. D. Deschuyteneer (AM1930); - (Malta) Buskett, 28.12.10, leg. C. Sammut (AM1499).