First described to science in 1997,[1] this species was previously classified as Cortinarius viridirubescens,[2] and is thus commonly known as the yellow-green cort.

[3] This California endemic mushroom's coloration is distinctive, with a chartreuse stipe to go with its yellow-green cap (the color can range from grass green to rusty orange).

[3] This mushroom has the "enlarged" bulb at the base that is typical of cortinarias, stains red in age, and according to the authors of Mushrooms of the Redwood Coast, has a "prominent cobwebby cortina of whitish yellow to light greenish yellow fibers over much of cap and stipe when young" but this feature is "ephemeral and often absent at maturity.

"[3] Typically found in oak woodlands, the fruiting triggers and edibility of the yellow-green calonarius remain undescribed.

This Cortinariaceae-related article is a stub.