A bright yellow, shaggy-scaled gilled mushroom with a Tricholoma-like stature, a double yellow ring and pale yellow gills. It is mycorrhizal in grassy areas under aspens or conifers, mainly in the Rocky Mountains in North America, and also occurs in Europe and Asia, where it is collected for food on the Qinghai-Tibet Plateau.
Ge et al. (2025) describe F. luteovirens as an edible species frequently collected in western China (Qinghai-Tibet Plateau) and say Floccularia species are sold in local markets in China and Europe. MushroomExpert gives no edibility information, and DNA work has not confirmed that North American material is the same species, so edibility of North American collections is not established; not recommended. Check white-spored, ringed mushrooms against Amanita.
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Habitat
Alone, scattered or in groups on the ground in grassy areas under aspens or conifers; late summer and fall in the Rocky Mountains.
Distribution
Europe and Asia (including the Qinghai-Tibet Plateau). In North America, western mountains, mainly the Rocky Mountains (illustrated collections on MushroomExpert are from Colorado), where it has been treated as F. straminea var. americana.
Characteristics
Cap: 5-13 cm, convex becoming nearly flat; dry, with soft bright yellow scales over a whitish ground; margin with shaggy veil remnants. Gills: attached, often notched; close to crowded; pale yellow, edges often jagged. Stem: 5-12 cm long, 1.5-3.5 cm thick; white and smooth near the apex, with shaggy yellow scales below; prominent white basal mycelium. Ring: shaggy, yellow, double. Flesh: white, firm, unchanging. Spore print: white. Spores: 6-7 x 3.5-4.5 µm, ellipsoid, smooth, weakly to moderately amyloid.
