Cortinarius boulderensis

Cortinarius boulderensis (Cortinarius boulderensis A.H. Sm., Lloydia 7 (3): 206 (1944) [MB#285705]

Discussion:
Cortinarius boulderensis is a small and slender mushroom, notable for its vinaceous brown tones and bright cinnamon-orange annular band. It is in Section Telamonia.

Description of Cortinarius boulderensis:
Cap 16-40 mm across, warm sepia, reddish brown to violaceous brown, with pale, sometimes plicate margin, surface moist, silky when dry  universal veil cinnamon-orange (Smith describes it as testaceous (a reddish-yellow or brownish color, like baked pottery or brick), gills lilac to grey when young, browning to cinnamon, stipe slender, fragile, base hollow, clavate, with distinctively colored orange annular band (or bands) 30-60 mm long and 3-5 mm wide at apex, flesh pale lilac grey above to brown below, KOH rx brown.

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ITS Analysis: NS4587 – The Dalles CG, WA State. 100% match to Type DQ499466.1

>NS4587 Cortinarius boulderensis (AH Smith)
AGGAAGTAAAAGTCGTAACAAGGTTTCCGTAGGTGAACCTGCGGAAGGATCATTATTGAAATAAACCTGATGGGTTGTTGCTGGTTCTCTAGGGAGCATGTGCACGCCTTGTCATCTTTATATCTCCACCTGTGCACCTTTTGTAGACCTTCCAGGTCTATGTTTCTTCATTTACACCAATGTATGTTAATAGAATGTTGTGCCTATAAAATATATATACAACTTTCAGCAACGGATCTCTTGGCTCTCGCATCGATGAAGAACGCAGCGAAATGCGATAAGTAATGTGAATTGCAGAATTCAGTGAATCATCGAATCTTTGAACGCACCTTGCGCTCCTTGGTATTCCGAGGAGCATGCCTGTTTGAGTGTCATTAATATATATATCAACCTTCTCTTGTTGAATGGTTTGGATGTGGGGGTTTGCTGGCCTCTTAAAGGGTTCAGCTCCTCTGAAATGCATTAGCAGAACAAACCTGTTCATTGGTGTGATAACTATCTACGCTATTGAATGTCAGGGGCAGTTCAGCTTTCTAACAGTCCTTGGACAAATCATCATTAATGTGACCTCAAATCAGGTAGGACTACCCGCTGAACTTAAGCATATCAATAAGCGGAGGAAAAGAAACTAACAAGGATTCCCCTAGTAACTGCGAGTGAAGCGGGAAAAGCTCAAATTTAAAATCTGGCAGTCTTTTGGCTGTCCGAGTTGTAATCTAGAGAAGTGTTATCCGCGCTGGACCGTG

Bibliography:

Niskanen, T. et al., “Cortinarius sect. Armillati in northern Europe”, Mycologia, 103(5), 2011, pp. 1080–1101

Smith, Alexander H. “New and Interesting Cortinarii from North America.” Lloydia 7 (September 1944): 163–235.

Soop, K., B. Dima, J.A. Cooper, D. Park, and B. Oertel. “A Phylogenetic Approach to a Global Supraspecific Taxonomy of Cortinarius ( Agaricales ) with an Emphasis on the Southern Mycota.” Persoonia – Molecular Phylogeny and Evolution of Fungi 42, no. 1 (July 19, 2019): 261–90. https://doi.org/10.3767/persoonia.2019.42.10.