Cortinarius calyptratus

Cortinarius calyptratus A.H. Sm. (1939)
Collection date: 20th October, 2018
Collector: Shannon Adams
Collection ID: SDA 401
Location: Buck Creek, Mt Rainier, WA
Habitat: Mature forest with old growth component.Western Hemlock, fir and Douglas Fir.

Description:
Pileus: 39-60mm wide, purple-grey to brown tones, appressed fibrillose, covered in patches of lavender-grey veil tissue.  Flesh: light-yellow in cap and bulb and blue-lilac under stipe context.  Paler in stipe center.  Gills: Lavender-grey when young to pallid brown.  Stipe: Lavender-grey 50-73mm tall, 11-15mm across at stipe-apex, bulbous, 18-25mm across at widest part. 

Discussion:
Smith described Cortinarius calyptratus from collections made in November 1937 under mixed spruce and redwood near Crescent City, California. Later Moser collected a species in the area, matching the description, occurring in oak and tanoak. He suspected that Cortinarius calyptratus species was an oak associate. It is likely that the oak associate is a different species.

Smith notes that C. calyptratus has a broad marginate bulb and that the cap is covered by violet fibrils which are bright at first, then fade. Also look out for violet mycelium in surrounding duff.

ITS:
Analysis match to KF732273.1 Holotype of A.H. Smith’s 1939 type collection. Match of 686/687 base pairs (difference is one barcode gap). Due to long barcode the QC was only 53%.

>SDA 390 – 18441433 -Cortinarius calyptratus – US – WA
GTGACCTGCGGAAGGATCATTATTGAAATAAATCTGATGAGTTGCTGCTGGTTCTCTAGGGGACATGTGCACACTTGTCATCTTTATATCTCCACCTGTGCACCTTTTGTAGACTTGGATATCTCTCTGAATGCTAGTCATTTGGGTTTGAGGAGTTGACTTCATGTCTCTCTTTACATTTCCAGGTCTATGTTTCTTCATATACCCAATGTATGTTATAGAATGTAACCAATGGGCTCTTTTGTGCCTATAAACTTATACAACTTTCAGCAACGGATCTCTTGGCTCTCGCATCGATGAAGAACGCAGCGAAATGCGATAAGTAATGTGAATTGCAGAATTCAGTGAATCATCGAATCTTTGAACGCACCTTGCGCTCCTTGGTATTCCGAGGAGCATGCCTGTTTGAGTGTCATTAATATATCAACCTCTTCAGCTTTTGTTTGTTGAGTGTTGGATGTGGGGGTTATTTTTTGCTGGTCTCTTCTAAAGGTCAGCTCCCCTGAAATGCATTAGCGGAACAATTTGTGGATCCGTTCATTGGTGTGATAACTATCTACGCTATTGACGTGAAACAAGTTCAGCTTCAAACAGTCCATTGACTTGGACATCTTTTCATTATTAATGTGACCTCAAATCAGGTAGGACTACCCGCTGAACTTAAGCATATCAATAAGCGGAGGAAAAGAAACTAACAAGGATTCCCCTAGTAACTGCGAGTGAAGCGGGAAAAGCTCAAATTTAAAATCTGTCAGTCTTTGGCTGTCCGAGTTGTAATCTAGAGAAGTGTTATCCGCGCTGGACCGTGTACAAGTCTCCTGGAATGGAGCGTCATAGAGGGTGAGAATCCCGTCTTTGACACGGACTGCCAGGGCTTTGTGATGCGCTCTCAAAGAGTCGAGTTGTTTGGGAATGCAGCTCAAAATGGGTGGTAAATTCCATCTAAAGCTAAATATTGGCGAGAGACCGATAGCGAACAAGTACCGTGAGGGAAAGATGAAAAGAACTTTGGAAAGAGAGTTAAACAGTACGTGAAATTGCTGAAAGGGAAACGCTTGAAGTCAGTCGCGTTGTCCAGGGATCAACCTTGCTTTTGCTTGGTGTACTTTCTGGTTGACGGGTCAGCATCAATTTTGACTGTTGGAAAAAGGTCAAGGGAATGTGGCATCTTTAGATGTGTTATAGCCCTTGGTTGC

References:
Smith, A.H., (1939) Studies in the Genus Cortinarius I, University of Michigan Press, Ann Arbor.

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