Psathyrella mesobromionis Arnolds

Diagnosis fuente: FUNGI NON DELINEATI - Pars XXVI - Rare and interesting species of Psathyrella Eef Arnolds - Ed. Candusso - I ALASSIO - (SV) 2003
     Pileus 16-30 mm latus, conico-convexus, dein plano-convexus, umbonatus, hygrophanus, in udo obscure rubro-brunneus, striatus, in sicco incarnatus centro brunneo-aurantiacus. Velum tenue, album, fibrillae in stipite paucae. Lamellae subdistantes, adnatae, ad 7 mm latae, pallide griseae, dein griseo-brunneae, acie floccosae albae. Stipes 33-45 x 2.5-3.5 mm, cylindraceus, fistulosus, eradicatus, pallide brunneus, apice albus. Caro pileo et stipitis concolor. Odor nullus.
     Sporae (9.0-)9,5-12,.5(-14.0) x (5.5-)6.0-7.5 um, nee lentiforma, ellipsoideae vel ellipsoideae-oblongae, rubro-brunneae, nec opacae, poro germanitivo distincto munitae. Basidia 17-24 x 9.0-12 jum, 4-sporigera. Acies lamellarum substerilis. Cellulae marginales: cheilocystidia pleurocystidioidea numerosa, 22-42 x 75-13 qm, lageniformia, hyalinia, cellulis spheropedunculatis et clavatis hyatinis intermixta, 12-22 x 7.5-16 yum. Pleurocystidia parum numerosa, 32-41 x 9-14 um, lageniformia vel fusiformia. Pileipellis hvymenidermiformis, cellulis 14-25 am latis. Caulocystidia lageniformia vel utriformia, 23-39 x 8.5-17 ym, cellulis clavatae vel subglobosae intermixta, 8.0-23 x8.0-19 um, Fibulae adsunt. 
Habitat: terrestris in graminosis ad terram siccam calcaream, autumno.