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Notes:
2 fruiting bodies growing on a well-rotted hardwood log, likely Fagus grandifolia. Pileus smooth. No noticeable bruising on any part. Pileipellis composed of rounded and cylindrical cellular elements. Pleurocystidia absent or rare. Cheilocystidia smooth, hyaline, thin-walled and globose to ellipsoid to ovoid. Cheilocystidia measurements: (17.5) 23.4 – 43.7 (50.4) × (13.7) 17.3 – 22.1 (29.1) µm, Q = (1) 1.3 – 2 (2.9); N = 28, Me = 33.1 × 19.6 µm; Qe = 1.7. Basidia 4-sterigmate. Basidia measurements: (19) 21.5 – 30.2 (30.6) × (7.8) 8 – 9.4 (9.5) µm, Q = (2.2) 2.5 – 3.5 (3.8); N = 30, Me = 25.4 × 8.6 µm; Qe = 3. Spores smooth and hyaline. Spore measurements: (5.2) 5.3 – 6 (6.3) × (4.8) 4.9 – 5.4 (5.6) µm, Q = 1 – 1.2 (1.3); N = 30, Me = 5.6 × 5.1 µm; Qe = 1.1

Species Lists

Images

2019-12-19-17.28.23 ZS PMax crop.jpg
2019-12-19-17.29.34 ZS PMax crop.jpg
2019-12-19-17.17.52 ZS PMax crop.jpg
20191005_152624 crop.jpg
DSC_6191 Cheilocystidia, basidia and spores at 400x in NH4OH (2 drops), congo red (1 red) and phloxine (1 drop).JPG
DSC_6198 Cheilocystidia, basidia and spores at 400x in NH4OH (2 drops), congo red (1 red) and phloxine (1 drop).JPG
DSC_6203 Cheilocystidia, basidia and spores at 400x in NH4OH (2 drops), congo red (1 red) and phloxine (1 drop).JPG
DSC_6209 Cheilocystidia, basidia and spores at 400x in NH4OH (2 drops), congo red (1 red) and phloxine (1 drop).JPG
DSC_6226 Pileipellis elements and spores at 400x in NH4OH (2 drops), congo red (1 red) and phloxine (1 drop).JPG
DSC_6227 Pileipellis elements and spores at 400x in NH4OH (2 drops), congo red (1 red) and phloxine (1 drop).JPG
DSC_6240 Spores at 400x in NH4OH (2 drops), congo red (1 red) and phloxine (1 drop).JPG

Proposed Names

61% (2)
Used references: Minnis, A. M., & Sundberg, W. J. (2010). Pluteus section Celluloderma in the USA. North American Fungi, 5, 1-107.
Vellinga, E. C., & Schreurs, J. (1985). Notulae ad Floram agaricinam neerlandicam—VIII. Pluteus Fr. in West-Europe. Persoonia-Molecular Phylogeny and Evolution of Fungi, 12(4), 337-373.
Singer, R. (1956). Contributions towards a monograph of the genus Pluteus. Transactions of the British Mycological Society, 39(2), 145-232.
Based on microscopic features
29% (1)
Recognized by sight: Similar European species
29% (1)
Recognized by sight: Similar but known from Florida and the Caribbean

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