In dense Western Hemlock/Douglas Fir stand
PILUS convex, with a low broad umbo, dry, minutely appressed-fibrillose-scaly with pale orange (HSV30:30:100) fibrils, medium orange brown (HSV00:50:70) on the umbo and more pale orange brown (HSV25:10-15:90) toward the margin, unchanging or darkening slightly in KOH, 30-33 mm in diameter. STIPE equal down to the slightly enlarged base, white to greyish white, marked by a prominent ring or universal veil material above and with additional smaller rings below, with rings pale orange (HSV30:30:100), dry, 80 X 7 mm. LAMELLAE pale tan (HSV20:15:90), subclose, adnexed and with a small decurrent tooth, not marginate. CORTINA white, abundant. FLESH light brown (HSV10:20-30:60-70), with a nondescript mushroom odour and taste, unchanging or darkening slightly in KOH.
This could totally be Agaricus bitorquis. However it was growing under a ponderosa in juniper park. Many of the soils are hard packed, but this was growing in duff rich soil with lots of pine needles. Stem not staining; smells amazing reminiscent of sweet almonds; annulus large; gills pink into maturity; stipe thick and dense
ID based on sequence and personal communication with Balint Dima. In mixed hardwood/conifer forest under hardwoods.
Caps up to 4 1/2 cm wide, convex with wavy margins becoming lacerate in age. Buttons brown with silvery fibrils becoming more tawny brown and losing the sheen in age. Context pale watery brown. Gills deeply notched or with decurrent tooth. Pale flesh-brown when young, then dark rusty vinaceous in age. Stipe up to 5 cm long and 8 mm thick. Dingy buff to pale dingy brown with the faintest lilac tinge at apex. Small bulb at base. Cortina pale orange. Odor and taste mildly raphanoid. Spores rusty. Habitat - Gregarious in live oak humus near Albany, Ga. on January 3, 1986.
Found in grass under a willow tree in a residential neighborhood. Only fruited 1x in 7 years.
Corner of 4th Ave NE and NE 85th Street, under large willow. On parking strip.