Hygrocybe rubroconica

Description. Pileus 5 - 25 mm broad, conical, conical when young, broadly conical, hemisphere to plano-convex when mature, sometimes with an umbo in center, red to vivid red (10 A 7 - 8, 10 B 7 - 8), usually darker at disc, translucently striate from the margin to about a half of radius, blackening when bruised or mature; margin incurved, white to light yellow to reddish yellow (4 A 5 - 6). Lamellae free, ventricose to broadly ventricose, white to yellowish white, blackening when bruised or mature, up to 4 mm broad, distinct, waxy, fragile, with 1 - 3 lamellula between two entire lamellae. Stipe 20 - 40 mm long, 1 - 4 mm thick, central, cylindrical, slightly enlarged towards the base, hollow, simitranslucent, pale yellow (4 A 3) to brownish orange (5 C 3 - 5), nigrescent when bruised or old, usually covered with white longitudinal fine fibrils when young. Basidiospores (7.5) 8 - 10.5 (11) x (6.5) 7 - 8.5 μm [mean length = 9 μm, mean width = 7.6 μm], Q = 1 - 1.47, Qm = 1.2, globose, subglobose, broadly ellipsoid to ellipsoid, smooth, thin-walled. Basidia 25.5 - 45 x 8.5 - 12 μm, mainly 2 - spored, rarely 4 - spored, clavate, containing some black endochrome in KOH, with sterigmata up to 10.5 μm long. Pseudocystidia present. Pileipellis as a cutis, comprised of parallel hyphae 4 - 10 μm wide, occasionally with bend hyphae, with some black inclusions. Stipipellis made up of parallel hyphae, occasionally with some thick-walled haphae. Hymenophoral trama regular, of hyaline and thin-walled hyphae 8.5 - 17 μm wide, sometimes containing blackish brown materials.