Growing on a hillside near Quercus alba, Quercus bicolor, Quercus sect. Lobatae, Carya ovata, Acer saccharum, Prunus serotina and Ulmus sp. Fruiting bodies collected 7.4 (cap) x 8 cm (stem) and 7.2 (cap) x 4.1 cm (stem) respectively. Caps yellow with orange to reddish-brown areas. Caps were dry when found but were covered with adhering debris. Cap margins greenish. Stems with marginate bulbs. Stems purple with some yellowish areas. Cortina remnants forming a ring on the stem. Context not staining when cut. Cap context purple in a layer above the gills and white above that layer. Stem context purple. Gills purple except for a rusty brown spore deposit. Odor indistinct. Taste of cap slightly mealy but otherwise indistinct. Cap surface mild when licked. ~60% KOH dark purple on reddish-brown portion of cap (meant to use 5% KOH instead). Spore measurements: (11.5) 13.3 – 14.1 (15.9) x (6.9) 7.5 – 7.8 (8.5) µm; Q = (1.5) 1.7 – 1.8 (2.1); N = 30; Me = 13.7 × 7.7 µm ; Qe = 1.8

Species Lists



Proposed Names

67% (2)
Recognized by sight: Yellowish cap with adhering debris; purple, non-bruising context; purple gills; marginate bulb.
Used references: Kauffman, C. H. (1932). Cortinarius. North American Flora 10: 282-348
Based on microscopic features: Spore size.
54% (1)
Used references: Bold-Repertoire Cortinarius(MQ)

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Something fishy happening here though.
By: Garrett Taylor (cappy)
2021-02-02 18:43:46 EST (-0500)

MQ said the sequencing didn’t succeed for C. atkinsonianus however, so they don’t have a sequence to back up that ID, that’s the first time I’ve come across that happening in their document. Also, the one they have, despite having a GenBank acquisition number of MT607412, it doesn’t appear to be in there. It is in Bold though.