Diagnosis fuente: PERSOONIA - A MYCOLOGICAL JOURNAL - VOLUME 14 - PART 4 - 1992 Rijksherbarium/Hortus Botanicus, Leiden, The Nederlands Pileus 9-15 mm latus, 5-9 mm altus, convexus vel leviter campanulatus; juvenilis centro umbrinus, obscuro-brunneus usque nigro-brunncus, marginem versus leniter pallidior, inter ‘tan’ ct umbrinus, scnescens perceptibile bicoloris, centro discontinuiter obscurior ct margine pallidus, dein centro nigro-brunneus ad niger, margine manifeste pallidior, griseo-brunneus, lacteo-coffeatus, vel luteo-brunneus *nougat’; in sicco centro grisco-brunneus vel lacteo-coffeatus, margine luteo-brunneos; hygrophanus, sed solum perjuvenilis indistincte striatus. Superficies glabra, impolita. Margo obtusus, interdum leviter undulato- crenulatus. Lamellae moderate distantes, anguste adnexae, plerumque uniformiter ochraceo-brunneae. Stipes 22-33 x 1-1.7 mm, cylindraccus, bulbo distincto 2.5 mm diametro, ad apicem primo griseo-aurantiacus , basin versus magis griscolinctus, postea totus supes obscurior usque avellaneobrunncus, grisco-brunneus. Tota superficies sub lente subtiliter farinosa. Caro odore et sapore vix manifestis. Sporae (7.3-) 8-9.5 x 4.5-5.5 um, maxima parte 8.5 x 5.0 um, ovoideo-ellipsoideae, leves, poro germinativo distincto, ca. 0.5-0.7 um lato, pariete moderate crassiusculo, in aqua pallide luteolae, inKOH luteo-brunneae. Basidia tctraspora, 18-21 x 8.5-10 um. Cheilocystidia lecythiformia, 17-22 x 9,5-11.5 um, capitulo 3.5-4.5 um diam., pars ventricosa prope collum distincte incrassata, hic parics luteus pigmentifer. Pleurocystidia nulla. Fibulae presentes. Epicutis pilei hymeniformis, ex elementis 15-22 (-30) um, rotundato pedicellatis, interdum dermatocysudia lecythiformia cheilocystdiis similia, cutis hyphis 2-13 um latis, pigmentis brunneis valde incrustantibus. Tegumentum stipitis e dermatocystidiis lecythiformibus, 15-22 x 7-12 um (capitulis 3-6 um diam.), interdum clementis cylindraccis vel clavato-cylindraceis, sine pilis. NH3-reactio: nulla. Habitat: in arenosis apertis inter muscos humiles in fluvii alluvionibus (typus) et in glareoso-arenosis viae novae silvaticae, ca. 900 et 1800 m s.m. Fructificat acstate et aulumno praccoci.
