Gasterocarp 1-6 cm diam., globose to tuberiform or irregular, often with a mycelial covering, attached by rhizomorphs but without a distinctly basal attachment. Peridium white to brownish or yellowish, at times bruising red, indehiscent. Gleba soft-fleshy, pale coloured becoming brownish, loculate, consisting of small and irregular, empty to partially filled chambers. Tramal plates gelatinized or partially so; clamp-connexions absent. Spores statismosporic, symmetric, narrowly ellipsoid to cylindric, often with a subtruncated base, hyaline to pale brown, with a slightly thickened smooth wall, lacking a conspicuous myxosporium. Basidia lageniform with a ventricose base, soon collapsing, typically bearing 6-8 sterigmata, sometimes less. Basidioles thick-walled, at times conspicuous. Hymenophoral trama subregular, subgelatinised, of narrow hyphae. Subhymenial layer pseudoparenchymatous. Peridiopellis a repent epicutis of narrow hyphae, and frequently with an encrusting pigment. Hypogeal or subepigeal, forming ectomycorrhizal associations, especially with Coniferae. World-wide. Type species: R. luteolus Fr.