Observation 403366: Cortinarius (Pers.) Gray

Notes:
Collector’s_Name: Joanne Schwartz
Substrate: Soil
Habitat: Oak woodland
Host: Coast Live Oak, Quercus agrifolia primary cover
Spore_Print: Rusty brown visible on stipes
Smell_&_Taste: No odor
Size: Caps from 9-10cm wide. Stipe 23mm-24mm wide. Bulbous base ro 5cm wide.
Chem_Test: NA
Staining: NA
Cap: Dry. Light to deep orange when mature. Yellow to deep orange when young. Lilac streaks in orange areas.
Spore_Structure: Lamellae lilac when young, orange brown mature. Adnate to adnexed. Stained lilac and brown.
Stipe: Covered with cortina remnants and spore deposit. Fiberous. Lilac streaks.
Other: A few found.

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Used references: California Mushrooms

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Cortinarius roseobulbus, which is not in the MO database tho. a valid name in Index fungorum
By: Bitty Roy (Bit)
2021-07-16 17:09:43 PDT (-0700)

Excellent ITS fit (99.67%) to the TYPE of Cortinarius roseobulbus. Described in Moser et al. 1997 who note that the outside of the bulb and rhizomorphs are pink, which is true here (see the MO record), and the lilac color of the new gills. It was described from further N in CA. Moser M, Ammirati JF. 1997. Studies on North American Cortinarii IV. New and interesting Cortinarius species (subgenus Phlegmacium) from oak forests in Northern California. Sydowia 49(1):25-48.