Psathyrella capitatocystis Kits van Waveren

Diagnosi originale: PERSOONIA - A MYCOLOGICAL JOURNAL - VOLUME 13 - PART 3 - 1987 Rijksherbarium, Leiden, The Nederland
Pileus 10—25 mm latus, exumbonatus, conicus, maturitate cinereus, brunnescens apicem versus, perstriatus, hygrophanus, in sicco margine admodum pallide cinereus, apicem versus pallide brunneus, apice dilute ochraceus. Velum album, primo e fibrillis fasciculisque fibrillosis numerosis zonam pilei marginalem 1—1.5 mm latam formans, nec appendiculatum, et fibrillae in stipite paucae. Lamellac 3—5 mm latae ad pilei marginem ventricosae, alibi rectae, adscendentes, late adnatae, acie albae. Stipes 50—90 x 2 mm, deorsum leviter incrassatus, eradicatus, cavus, apice eximie pruinosus. Caro pilei centro ] mm crassa, brunnea, stipitis alba, Sporae in cumulo purpureo-atrae, 8—10 x 4.5—5 um, pilei centro ] mm crassa, brunnea, stipitis alba, Sporae in cumulo purpureo-atrae, 8—10 x 4.5—5 um, ellipsoideae, nec phaseoliformes, obscurae, in aqua observatae obscure badiac, nec opacae, poro germinativo ellipsoideae, nec phaseoliformes, obscurae, in aqua observatae obscure badiac, nec opacae, poro germinativo distincto munitae. Basidia 20—22.5 x 8—10 um clavata, 4-sporigera, Pleurocystidia (35—)40—50 x 12.5—17.5(—20) um, sat numerosa, utriformia, plurimum subutriformia vel ventricoso-fusiformia, nonnulla capitata, collo lato brevique praedita, interdum collis tenuitunicatis. Cellulae marginales: cheilocystidia pleurocystidioidea 30—40 x 10—12.5 (— 15) um, numerosa, vulgo capitata, cheilocystidiis spheropedunculatis et clavatis 10—20(—22.5) x 7.5—17.5 um intermixta. Pileipellis e cellulis formata. Trama lamellarum colorata. Terrestris, solitaria, in graminis sub Betula.