Notes:
Growing in a mulched flower bed under Pinus strobus. Gills occasionally branching. Gills becoming pink with spore deposits during drying. Did not notice clampe connections in the lamellar trama. Irregular thin-walled cheilocystidia present (leptocystidia). Brownish pseudocystidia abundant on the gill faces. Basidia 4-sterigmate. Spores appearing almost smooth in side view and angular in polar view. Spore measurements from Piximetre: (6.2) 6.9 – 8.5 (8.9) × (3.7) 3.8 – 4.9 (5.1) µm, Q = (1.5) 1.6 – 2 (2.1); N = 30, Me = 7.6 × 4.3 µm; Qe = 1.8
Individial spores: 7.05 × 4.05 µm, 7.17 × 3.71 µm, 7.66 × 3.90 µm, 7.32 × 3.66 µm, 6.17 × 3.87 µm, 8.16 × 4.56 µm, 8.40 × 4.96 µm, 8.07 × 4.41 µm, 8.75 × 4.95 µm, 8.24 × 4.92 µm, 7.23 × 4.82 µm, 8.45 × 4.82 µm, 7.61 × 4.13 µm, 7.87 × 4.58 µm, 8.89 × 4.21 µm, 8.57 × 4.81 µm, 7.83 × 3.89 µm, 7.60 × 4.05 µm, 7.28 × 4.07 µm, 7.12 × 3.91 µm, 6.93 × 3.67 µm, 6.97 × 4.54 µm, 6.40 × 3.99 µm, 6.93 × 3.82 µm, 7.48 × 3.89 µm, 7.14 × 4.14 µm, 8.24 × 4.23 µm, 6.63 × 4.38 µm, 7.54 × 4.58 µm, 8.32 × 5.15 µm

Species Lists

Images

IMG_8059.JPG
IMG_8061.JPG
IMG_8060.JPG
IMG_8063.JPG
IMG_8064.JPG
DSC_9514 Cheilocystidia and basidia on gill edge at 400x in NH4OH (2 drops), congo red (1 red) and phloxine (1 drop).JPG
DSC_9531 Pseudocystidia on gill face at 400x in NH4OH (2 drops), congo red (1 red) and phloxine (1 drop).JPG
DSC_9537 Spores at 400x in NH4OH (2 drops), congo red (1 red) and phloxine (1 drop).JPG
DSC_9557 Lamellar trama at 400x in NH4OH (2 drops), congo red (1 red) and phloxine (1 drop).JPG
DSC_9562 Spores at 400x in NH4OH (2 drops), congo red (1 red) and phloxine (1 drop).JPG
DSC_9565 Basidia at 400x in NH4OH (2 drops), congo red (1 red) and phloxine (1 drop).JPG

Proposed Names

-29% (1)
Recognized by sight
31% (2)
Recognized by sight: (cf. caelata) really not sure…
57% (1)
Used references: Largent, D. L., & Baroni, T. J. (1988). How to Identify Mushrooms to Genus VI: The Modern Genera (Vol. 6). Mad River Press Inc.
Noordeloos, M. E. (1983). Notulae as Floram agaricinam neerlandicam—I-III. Marasmiellus, Macrocystidia and Rhodocybe. Persoonia-Molecular Phylogeny and Evolution of Fungi, 12(1), 31-49.
Vizzini, A., Picillo, B., Ercole, E., Vila, J., & Contu, M. (2016). Rhodocybe formosa (Agaricales, Entolomataceae): new collections, molecular data and synonymy, and Rhodocybe griseonigrella comb. nov. Phytotaxa, 255(1), 34-46.
Baroni, T. J. (2017). Mushrooms of the northeastern United States and eastern Canada. Timber Press.
Based on microscopic features

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= Observer’s choice
= Current consensus

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