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The following material is based on original research by R. E. Tulloss.
Field notes and phenoloxidase testing by Dr. Adriana Montoya-Esquivel.
78 - 92 mm wide, orangish yellow (4A4) over disc, otherwise brownish red-orange (7B7-8), becoming darker brownish red-orange (7D7) in age, convex to plano-convex, slightly shiny; context white except for yellow (3A5) just below pileus, unchanging when damaged, 7 - 9 mm thick over stipe, evenly thinning to margin; margin nonstriate, nonappendiculate; universal veil yellow to orange-yellow (3-4A5), floccose, in patches, detersile, unchanging when damaged.
free, without decurrent line on upper stipe, crowded, light yellow to yellow (3A3-4) in mass, light yellowish white to light orangish white (3-4A2) in side view, 4 - 4.5 mm broad, not forking; lamellulae subtruncate to subattenuate to attenuate, [??distribution??], in diverse lengths, plentiful.
72 × 24 - 27 mm, light orangish yellow (4A3) above partial veil and white to whitish below, cylindric, not flaring at apex, with surface slightly granulose to fibrillose; bulb 28 × 21 mm, narrowly subnapiform, with orange-brown (7E6) spot on exterior surface; context white, staining pale orangish white (5A2), solid; partial veil superior, pale yellow to orangish yellow (3A3 to 4A6), membranous, pendent, skirt-like, somewhat fragile, pulverulent above; universal veil orange-yellow (4A6), in loose patches, detersile, floccose-submembranous.
Odor very slight, mild. Taste not recorded.
Spot test for tyrosinase (paracresol) - In both immature and mature material, entire context strongly positive in 2 min; during that time, lamellae unchanging. Spot test for laccase (syringaldazine) - negative throughout 19 min. test period. Test voucher: Tulloss 7-16-96-F.
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a single collection inadvertently contains a mixture of taxa.