Psathyrella perpusilla Kits van Wav

Diagnosis fuente: PERSOONIA - A MYCOLOGICAL JOURNAL - VOLUME 13 - PART 3 - 1987 Rijksherbarium, Leiden, The Nederlands
    Pileus 3—5(—8) mm, parabolicus, striatus, obscure badio-cinereo-brunneus, hygrophanus, in sicco centro pallide ochraceus, marginem versus pallescens, colore rosco destitutus, eximie micaceus, leviter rugulosus. Velum album, primo dense membranaceum, pileum cet stipite conjugens, fibrillas numerosus pilei marginem formans. Lamellae 1.5 mm latae, ventricosae, late adnatae, obscure badiac, acic albae. Stipes 20—25 x 0.75—1 mm, cylindraceus, albus, eradicatus, apice pruinosus. Caro pilei eximie albae.
   Sporae in cumulo obscure purpureo, 8.0—9(—10) x (S—)5.5—6.5 um, late ellipsoideae, haud phaseoliformes, in aqua observatae obscure badiae, poro germinativo 1.5 um munitae. Basidia 15—25 x6.5—9 wm, clavata, 2-sporigera. Pleurocystidia 32.5—42.5(—50) x7.5—12.5 wm, moderatim numerosa, lageniformia vel sublageniformia, collo subcylindraceo praedita, tenui-tunicata. Cellulae marginales: cheilocystidia pleurocystidioidea 20—35(—37.5—40) x 7.5—10 (—12.5) um numerosa, cellulis sphacropedunculatis et clavatis, 15—20(—22.5) x 7.5—12.5 wm intermixta. Trama lamellarum colorata. Pileipellis e cellulis formata, nec colorata. Terrestris, in terram argillosam inter graminis in silva frondosa (Alnus, Populus), solitaria.