Psathyrella romagnesii Kits van Wav.

Diagnosis fuente: FUNGI NON DELINEATI - Pars XXVI - Rare and interesting species of Psathyrella Eef Arnolds - Ed. Candusso - I ALASSIO - (SV) 2003
   Pileus 3-8 mm broad, 2-4 mm high, hemispherical, hygrophanous,when moist rather dark greyish brown (K. & W. 6L4, 65, 6L6), translucently striate up to centre, smooth, on drying becoming pale brownish grey (5B2, 5C2, 5D2, 6C3). Veil not seen. Lamellae, L = 8-13, 1 = 3, subdistant, broadly adnate, not or slightly ventricose, slightly purplish grey-brown, with white crenulate edge, not red underlined. Stipe 6-16 x 0.3-1 mm, cylindrical, fistulose, not rooting, white, at apex pruinose. Context concolorous with surface. Smell weak, not distinctive. Spore print blackish,
   Spores 10.0-12.0(-13.0) x 5.5-7.0(-7.5) tum, on the average 11.2x 6.1 um, Q = 1.7-1.9(-2.0), Qav. = 1.85, not flattened, ellipsoid-oblongto ovoid-oblong, dark reddish brown (Mu. 10 YR 2/3) tn ammonia,subopaque, with large, apical pore, |.5-2.5 um wide. Basidia 16-21 x 8.5-10 tum, 4-spored. Lamella edge sterile, made up of numerous pleurocystidioid cheilocystidia, 30-39 x 8.5-11 um, lageniform to subfusiform = with cylindrical or tapering neck, at apex often subcapitate, 4.0-5.5 tum broad, intermixed with numerous spheropedunculate and clavate cells, 15-22 x 8.0-13 pm. Pleurocystidia scattered, 35-51 x 9.0-I11 jim, narrowly I lageniform to subfusiform with neck 3.5-5.0 um broad, often subcapitate, at apex 4.5-6.0 um broad. Pileipellis an epithelioid hymeniderm, made up of clavate and pyriform cells, 28-50 x 24-43 um. Stipitipellis a cutis, made up of parallel, hyaline hyphae, 2.0-6.0 ttm broad, at apex with few clusters of caulocystidia. Caulocystidia like pleurocystidia, subcapitate but almost all collapse      
intermixed with globose and ellipsoid cells, up to 16 x 12 um. Clamp-connections not seen.Collection depicted –
THE NETHERLANDS, Mantinge, ‘Hullenzand’, on old, straw-rich dung of cattle in dry grass-heath