Marasmiellus inoderma (Berk.) Singer ex Furneaux

Descripción original
Fruitbodies (Fig. 1) subcartilaginous, mostly gregarious or in small tufts, growing on larger debris of monocotyledons. Pileus 10-30(350) mm across, at first convex, with or without depressed centre, later partly applanate to depressed,sometimes slightly papillate, almost entirely striate to sulcate with age; surface at first brownish orange [5B4-5C4], very soon becoming white with a faint pinkish hue, sometimes slightly translucent, subhygrophanous, subtomentose to pruinose at first, becoming partly glabrous, drying pale-yellowish all-over [4A2]; margin deflexed at first, becoming straight to reflexed, striate to sulcate, flexuose to lobed. Lamellae at first white, becoming yellowish when dry [4A2], 1-2(2.5) mm broad, thin, subdistant, simple, scarcely forked or intervenose, linear, adnate to subadnate (occasionally pseudocollariate), flexible; interlammelar space rugulose, with 2-3(4) lamellulae inserted per lamella; lamella edge even, concolorous or slightly paler. Stipe 4-15(20) × 1-2 mm, subcentral becoming excentric with age, cylindrical or slightly tapering downwards, often slightly compressed, straight or curved, solid, with a slightly swollen base; stipe surface dry, entirely powdery, partly glabrescent with age, white, drying yellow [4A2], the base always with a distinctly pinkish, orange to dull red [8C4] pubescent zone. Basal mycelium white, thin, radiating and appressed to the substrate. Context white, thin, compact, subcartilaginous, fibrous in the stipe. Taste pronounced, mild, fungoid; smell strongly fungoid, pleasant.
Spore print white. Spores (fig. 2) ellipsoid, (6.8-)6.9-8.8-10.6(-10.7) × (4.2-)4.2-4.9-5.7(-6) μm, l/w = (1.53-)1.52-1.77-2.02(-2.05) {N = 43}, smooth, hyaline, often (bi)vacuolate, thin-walled, inamyloid. Basidia (fig. 3) clavate, 20-30 × 7-8 μm, mostly 4- sterigmate. Cheilocystidia (fig. 4) abundant, making the lamella edge almost sterile, clavate to ventricose, (11.2-)10.6-16.6-22.7(-24.6) × (5.8-)5.8-7.6-9.5(-9.9) μm, l/w = (1.59-)1.46-2.19-2.92(-3.22) {N = 42}, with a knotty outline due to numerous (4-8) simple or forked outgrowths of 1-3 × 0.5-1 μm. Pleurocystidia absent. Hymenophoral trama subregular to regular. Pileipellis (fig. 5) a dry cutis, not a typical Rameales-structure, composed of interwoven filamentous hyphae (30-45× 5-18 μm) beset with short nodulose or diverticulate elements, the latter (5.3-)4.9-6.6-8.4(-8.4) × (3.3-)3.4-4.3-5.2(-5.1) μm, l/w = (1.17-)1.06-1.55-2.04(-2.13) {N = 28}, Fig. 1. Marasmiellus inoderma. Basidiocarps. Scale bar = 1 cm. Ethnomycology of Marasmiellus inoderma 317 easily coming loose, creating a powdery surface. Stipitipellis (fig. 6) composed of simple filamentous hyphae (15-30 × 2-4 μm), bearing series of isodiametric cells, with terminal cells of 4-12 μm long. Clamp connections present in all tissues. Ecology: Saprotrophic on dead wood and remains of monocotyledons, typically on remains of the oil palm (Elaeis guineensis Jacq.), but also on Musa sp. and on the grass Andropogon gayanus Kunth. Appearing at the onset of the rainy season and frequent as long as the rains last, i.e. from May till October. It is common in the oil palm plantations and ruderalised areas in the south of Benin and Togo, towards the drier north (Sudanian influence) it becomes rare. Distribution: Marasmiellus inoderma was first describe