Cortinarius elegantio-occidentalis

Cortinarius elegantio-occidentalis Garnica & Ammirati: 13 + Additional file 3: 23 (2011)

Cap 40 – 150 mm wide, smooth to radially fibrillose, yellow-ochre, olive-yellow to yellow-brown in age, edge and disc lighter (yellow to buff) viscid at first, then dry, gills pale yellow to olive then ochre brown when mature, stipe bulbous, 55 – 100 mm long, 14 – 25 mm wide at apex, up to 35 mm + in bulb base, sulphur-yellow, to yellow-ochre browning in age, veil pale cream, flesh firm, yellow-white to yellow. KOH: Pinkish red on stipe, and some slight reddening on cap (typically is pink to red, but can be variable). Color change: the authors’ description notes that all species in this group show some color change in the flesh at stipe base. It can vary from a quick pink-red flush on cutting to a slow (15 minute to hours) or absent pink reaction Habitat: Mixed conifer forest in Cascade and coastal ranges.

Microscopy: Type description lists spores as 12.5 – 15.5 x 7.5 – 9 (with outliers up to 18 microns long and 10 microns wide, citriniform, coarsely verrucose. (Garnica et al. 2011)

Cortinarius elegantio-occidentalis is one of three species in the “Elegantior” group. While Cortinarius elegantior itself is not known outside Europe, there are two closely related North American species – Cortinarius elegantio-montanus (described from Wyoming) and Cortinarius elegantio-occidentalis from WA and OR.

Source: Figure S1 – Garnica et. al. 2016

Key points of ID for this group include:
– Yellow-brown to olive-brown to brown cap
– yellow gills, stipe and veil
– yellow-white to pale yellow flesh
– pink-red KOH reaction
– pinkish-red stain in stipe base (variable)
– species are hard to differentiate morphologically, but range varies.

This collection has two spaces different to the type GU363477, and one ambiguous base.

>SDA391 – 18455481 – WA

Sigisfried Garnica, Phillip Spahn, and Joseph Ammirati, “Tracking the Evolutionary History of Cortinarius Species in Section Calochroi, with Transoceanic Disjunct DistributionTracking the Evolutionary History of Cortinarius Species in Section Calochroi, with Transoceanic Disjunct Distributions s,” Evolutionary Biology 11 (2011): 213.

Sigisfredo Garnica, Max Emil Schon, and Kessy Abarenkov, “Determining Threshold Values for Barcoding Fungi: Lessons from Cortinarius (Basidiomycota), a Highly Diverse and Widespread Ectomycorrhizal Genus,” FEMS Microbiology Ecology 92, no. 4 (2016).

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