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MycoBank: 321366 Basionym: Psilocybe senex Peck 1888 in Rep. New York State Mus. 41: 70 Original diagnosis: |
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"Pileus thin, hemispherical, obtuse, hygrophanous, dark brown and striatulate when moist, pale cinereous and shing when dry, somewhat squamose with superficial subfasciculate whitish fibrils, the margin appendiculate with the same; lamellae broad, subdistant, adnate, at first grayish, then brown or blackish-brown with a white edge; stem slender, hollow, fragile, minutely floccose-pruinose, sibpellucid, white; spores brown, elliptical, .0003 in. long, .0002 broad. Pileus 6 to 10 lines broad; stem 1.5 to 3 in. long, 1 line thick. Decayed wood in woods. Catskill mountains. September. The species is apparently related to P. canifaciens, but is at once distinguished by its slender white stem. The specific name has referance to the white hairs or fibrills of the pileus, which are suggestive of the white hairs of old age." |
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Type: USA: New York. Catskill Mountains, August, C. H. Peck (NYSf2751) |
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Important synonyms: |
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Drosophila ocellata Romagn. 1952 in Bull. mens. Soc. linn. Lyon 21: 154 Psathyrella ocellata (Romagn.) M.M. Moser 1967 in Gams, Kl. Krypt.fl. 2b/2, 3. ed.: 222 Psathyrella badia Kits. v. Wav. 1987 in Persoonia 13(3): 348 Psathyrella capitatocystis Kits v. Wav. 1987 in Persoonia 13(3): 342 Psathyrella communis A. H. Sm. 1972 in Mem. N. Y. bot. Gdn. 24: 392  Psathyrella distans A. H. Sm. 1972 in Mem. N. Y. bot. Gdn. 24: 368  Psathyrella fallax A. H. Sm. 1972 in Mem. N. Y. bot. Gdn. 24: 163  |
Psathyrella friesii Kits van Wav. 1977 in Persoonia 9(2): 282 Psathyrella fulvescens var. brevicystis Kits van Wav. 1985 in Persoonia, Suppl. 2: 281 Psathyrella fuscospora A. H. Sm. 1972 in Mem. N. Y. bot. Gdn. 24: 414 Psathyrella ploddensis Kits van Wav. 1987 in Persoonia 13(3): 357 Psathyrella pseudotrepida A. H. Sm. 1972 in Mem. N. Y. bot. Gdn. 24: 409  Psathyrella trivialis Arnolds 1982 in Biblioth. Mycol. 90: 437 (?) Psathyrella twickelensis Kits v. Wav. 1987 in Persoonia 13(3): 344 |
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Misappl.: Psathyrella fusca (Schum.) A. Pears. ss. Enderle 1987 in Beitr. Kenntn. Pilze Mitteleur. 3: 246 Psathyrella fusca (Schum.) A. Pears. ss. Enderle 1997 in Boll. Gruppo micol. G. Bres. 40(2-3): 196 Psathyrella fusca (Schum.) A. Pears. ss. Kits v. Wav. 1985 in Persoonia Suppl. 2: 218 |
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Select. descript.: Arnolds (2003): 53ff. (as Psathyrella twickelensis), 69f. (as P. ocellata), Breitenbach & Kränzlin (1995): 268 (as P. aff. friesii), Enderle (1992): 91f. (as P. fulvescens var. brevicystis), (1997): 7f. (as P. ocellata), (2004): 411f. (as P. ocellata), Keizer (1993): 208 (als Psathyrella fulvescens var. brevicystis), Kits v. Wav. (1985): 218ff. (as P. fusca), 250f. (as P. friesii), 260f. (as P. fulvescens var. brevicystis), 268f. (as P. ocellata), Kits v. Wav. (1987): 342ff. (as P. capitatocystis), 344f. (as P. twickelensis), 348f. (as P. badia), 358ff. (as P. ploddensis), Ludwig (2007): 670ff. (as P. ocellata), Melzer (2008a): 90ff. (as P. ploddensis), Örstadius & Knudsen (2008): 616, Romagnesi (1982): 37f. (as P. ocellata), Siepe (1998): 11f. (as P. ocellata), Smith (1972): 163f. (as P. fallax), 230f., 368f. (as P. distans), 392f. (as P. communis), 409 (as P. pseudotrepida), 414f. (as P. fuscospora), Yan & Bau (2017): 144 + 146
Select. icons: Breitenbach & Kränzlin (1995): 269 (as Psathyrella aff. friesii), Enderle (2004): 412 (as P. ocellata), Ludwig (2007a): 200 + 201 (as P. ocellata), Melzer (2008a) 91, Abb. 3 (as P. ploddensis), Vasoutová (2009): 13 (as P. friesii), Yan & Bau (2017): 141 |
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Macrocharacters: Pileus 7-60 mm broad, young convex to flat conical, later spreeding with often bent margin and small umbo, finely but densely rugolose, moist striated, dark brown, fading to pale brown to grey brown, without pinkish tones, center remains a long time darker. Veil only visible on young caps, very volatile. Lamellae close to somewhat distant, broadly adnate, at first grey, later brown, edge white. Stipe 20-150 x 2-6 mm, often appearing disproportionately long, sparse flocculosa, silky shiny and zoned, base slightly enlarged, apex pruinose. Spore print black with a trace of red. |
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Microcharacters: Spores 6,5-10 (-12,5) x 3,8-7 µm, av. 7,4-10,6 x 3,9-6,1 µm, av. Q=1,60-1,97, slender ellipsoid, ellipsoid, ovoid, in side view rarely slightly phaseoliform, germ pore distinct. In water brown, in ammonia dirty brown, in KOH dark grey brown to blackish brown, not opaque. Basidia (6,3-) 20-25 x (3-) 8-9,5 µm, 4-spored. Cheilocystidia 16,5-50 (-70) x 5,5-18 µm, utriform, rarely sublageniform, crowded, rarely with gaps. Undermixed by moderately numerous sphaeropedunculate marginal cells up to 30 x 20 µm, large cells sometimes with slightly thickened walls and brownish pigmented. Edge usually not pigmented, but sometimes yellowish below pigmented thick-walled marginal cells. Pleurocystidia 30-63 (-70) x 8-20 µm, utriform, sometimes pale brownish pigmented, numerous. Clamps present. |
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