Hohenbuehelia nigra (Schwein.) Singer

Hohenbuehelia nigra
Carpóforos de pequeño tamaño, de apenas dos cm. la mayor, sombrero de color grisáceo azul oscuro, más claro en el borde del sombrero, con forma de abanico y de cutícula como gelatinosa y elástica. Himenio con láminas separadas y abundantes lamélulas concoloras con el sombrero y tonos más anaranjados y claros en los ejemplares jóvenes. De pié `practicamente inexistente y de olor y sabor harinosos, bastante insípido. Esporada en masa de color blanco.
Diagnostico original 
ALTlERTO ET AI..: REEVALUATION OF HOHENBUEHEUA NIGRA GROUP
Pileus 3.5-7 mm diam, convex, circular, pseudo stipe not observed, attached to substratum by the un derside of the pileus, pruinose, very dark gray (5YR3/1) at the base and black (5YR 2/1) towards the margin, lighter in the center due to a whitish pruina that becomes less abundant towards the margin until finally glabrous; margin crenulate, concolorous with pileus. Lamellae adnexed with ehentric attachment, close to distant, very dark gray (5YR 3/1); margin entire. Context appearing gelatinous in section when soaked, concolorous with pileus. Spores (FIG. 2) 7-7.5 X 4-4.5 J.1m, short ellipsoid, thin-walled, hyaline, fu soid, smooth, nonamyloid, Basidia (FIG. 2) 20-23 X6.5-7.5 u.m, clavate, 4-spored. Basidioles (Ftc.. 3) 2530 X 4-5 J.1m, with gelatinizing walls up to 3 J.1rn thick. Pleurocystidia pseudocystidiate (FIG. 5) metu loid, 50-70 X 8-14 J.1m, projecting ca 20 J.1m above loid, 50-70 X 8-14 J.1m, projecting ca 20 J.1m above the hyrnenium, with the basal portion immersed in the trama and usually recurved, very thick-walled, brown, darker at the base; pigment cytoplasmatic, be coming lightcr to hyaline towards the apex; apex ex tremely acute, encrusted with small, nonamorphous polyhedric crystals. Cheilocystidia of identical shape and size. Pileipellis a cutis formed by three types of closely interwoven generative hyphae: (i) 2-5 J.1m diam, thick-walled, brown, clamped (FIG. 4), whose ends form structures similar to mycosdereids (Wright, 1955), vcry irregular in shape, 13-17 X 3510 J.1m (FIG. 7); (ii) 1.5-2 J.1m diam, hyaline, clamped, thin-walled, and (iii) 1.5-2 J.1m diam, hya line, clamped, thick-walled (FIG. 1). Pileocystidia (FIG. 6) metuloid, 22-32 X 8-10 J.1m, with a brown, thick wall and more or less blunt apex with encrusted crys tals all along the cystidium. Context formed by a loose trama of clamped hyphae 1.5-2.5 J.1m diam with thin, gelatinized walls.

Fuente de la foto: https://www.fungipedia.org/setas-informacion-y-consultas/19-microscopia/69374-hohenbuehelia-atrocaerulea-una-de-fea.html