Flaming Pholiota

Pholiota flammans

''Pholiota flammans'', commonly known as the yellow pholiota, the flaming Pholiota, or the flame scalecap, is a basidiomycete agaric mushroom of the genus ''Pholiota''. Its fruit body is golden-yellow in color throughout, while its cap and stem are covered in sharp scales. As it is a saprobic fungus, the fruit bodies typically appear in clusters on the stumps of dead coniferous trees. ''P. flammans'' is distributed throughout Europe, North America, and Asia in boreal and temperate regions. Its edibility has not been clarified.
A Scaly Closeup. A young Flaming Pholiota living up to its name. It was with a few others of its kind growing on a decaying fir tree.
https://www.jungledragon.com/image/83749/young_specimens_of_pholiota_flammans.html
 Canada,Flaming Pholiota,Geotagged,Pholiota flammans,Summer

Appearance

''Pholiota flammans'' often has a striking appearance. The cap is initially round, then convex and finally flattening with age. Its surface is bright yellow to orange, and covered with triangular scales arranged in concentric rings. The cap surface is dry, matt and felt-like, and in wet conditions may lose scales. The cap margin remain curved slightly inwards. The yellow gills are crowded together, attached to the stem, and have a notch where the gill attaches to the stem. A bright yellow partial veil extending from the cap edge to the edge is present in immature species. As the cap expands and flattens with age, the partial veil tears, leaving a faint ring around the stem. The cylindrical straight or curved stem is itself covered in yellow squamules below the ring. The base of the stem, typically more orange in color than the upper portion, is firmly attached to the dead wood from which the fungus arises. The section of stem above the ring bears little or no protuberances. The flesh is firm, full, yellow and does not change color when bruised or injured.

The dimensions of the fruit body are as follows: cap diameter up to 8 cm , stem up to 12 cm tall and between 0.4 to 1 cm cm thick.
As the fruit body matures, the gills darken to cinnamon brown following spore release. The spore mass is colored brown to rust.
Bright Yellow Pholiota  Fall,Flaming Pholiota,Geotagged,Pholiota flammans,United States

Naming

Other members of the genus ''Pholiota'' may be mistaken for ''Pholiota flammans'', especially ''Pholiota squarrosa'' which commonly forms large tufts at the base of deciduous as well as coniferous trees. ''P. squarrosa'' tends to be a less intense yellow color than ''P. flammans''. ''P. adiposa'' is also similar, but prefers to grow on dead hardwoods; unlike ''P. flammans'', it has gelatinous scales on the stem as well as the cap.

The North American species once described by Alexander H. Smith, ''P. kauffmaniana'', is closely related to ''P. flammans'', but differs in having a more distinctly viscid cap. Smith was later to revise his opinion on the existence of ''P. kauffmaniana'' as a unique species—he believed that environmental variations in humidity were the cause of differences in the cap cuticle gelatinization observed in Pholiotas collected from different North American locales. ''P. kauffmaniana'' is now considered synonymous with ''P. flammans''.
Young Specimens of Pholiota flammans. These were growing on a decaying moss covered Douglas Fir log.     
https://www.jungledragon.com/image/83750/a_scaly_closeup.html Canada,Flaming Pholiota,Geotagged,Pholiota flammans,Summer,Yellow Pholiota

Distribution

Being saprobic, ''P. flammans'' is found exclusively on dead and decaying stumps and trunks of coniferous trees, with fruit bodies appearing in tufts or singly, from summer to autumn. It is a fungus with a wide geographical distribution in boreal and temperate regions, and may be considered common to rare depending upon the region in which it occurs. It is found throughout Europe and North America . The species has also been collected in Asia, including India and China.
Bright Yellow mushroom seems like it must be the right time and conditions for Pholiota -this is the 3rd species I've come across in the last few weeks Fall,Geotagged,Pholiota flammans,United States

Habitat

Being saprobic, ''P. flammans'' is found exclusively on dead and decaying stumps and trunks of coniferous trees, with fruit bodies appearing in tufts or singly, from summer to autumn. It is a fungus with a wide geographical distribution in boreal and temperate regions, and may be considered common to rare depending upon the region in which it occurs. It is found throughout Europe and North America . The species has also been collected in Asia, including India and China.

References:

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Taxonomy
KingdomFungi
DivisionBasidiomycota
ClassAgaricomycetes
OrderAgaricales
FamilyStrophariaceae
GenusPholiota
SpeciesP. flammans