Microscopic:
spores 5.5-6 x 3-3.2 microns; inamyloid; basidia 4-spored, 20-25 x 5-5.5 microns, subclavate, sterigmata 4-5 microns long; hyphae of trama without clamp connections, with non-gelatinized walls; interior composed of hyphae with noticeably thickened walls comprising a mixture of narrow hyphae 3-4 microns wide and wider hyphae (5-6 microns wide and up to 10 microns wide in the head), at the stem level the interior is bordered by a cortex reduced to 3-4 layers of hyphae 3-5(6) microns wide, with walls a bit thicker and colored, but in the head, which lacks a cortex, the hymenium rests on a subhymenium more or less with gaps, 20 microns thick, of narrow hyphae 3-4 microns wide with thin walls, essentially oriented longitudinally; short rounded protuberances or narrower short finger-like papillae occur on cortical hyphae, at the extreme base of the stem there are protuberances with walls a little thickened and colored, sometimes shaped like several glove fingers, 3-5 x 4 microns, on the rest of the stem papillae predominate 1-2(3) x 1-1.2 microns, particularly numerous on upper stem; sclerotium not gelatinized, with normal epidermoid structure with cutis 5-10 microns thick, seen from above epidermoid with small somewhat regular thick-walled cells