Anamorph: not consistently associated with the teleomorph. Diederich (1996) observed that "lunate conidia have been observed in one specimen, asteroconidia in two specimens and catenate conidia are frequent in some specimens; zygoconidia [are] absent." Teleomorph: basidiomata 0·1-1·2 mm diam.; waxy to gelatinous, pinkish, pale brown, reddish brown, greyish brown to almost black, convex, often with a constricted base, old basidiomata often tubercu!ate; sometimes inducing gall formation or reduced and growing in the hymenium of the host. Context hyphae 2-3·5 µm diam., thin-walled, clamp connections not observed in most specimens. Haustorial branches frequent, tremelloid, the mother cell subspherical to ellipsoid, 2·5-5 µm diam., haustorial filament ca 0·5 µm diam. and 1-8 µm long. Hymenium mostly hyaline, sometimes with dark brown thick-walled hyphae in the outer part with cells 8-15 x 4-9 µm, containing numerous probasidia. Probasidial initials ellipsoidal, proliferations occurring through the basal clamp. Hyphidia and cystidia absent. Basidia, when mature, 24-55 x 5-7 (-9) µm, cylindrical, aseptate, rarely subspherical, 9-11 µm diam., with (2-) 3-4 epibasidia; epibasidia subulate, I ·5-2·5 µm diam. and 5-9 µm long. Sterigmata refractive at the tip. Basidiospores 7·5-11 x 3·5-6·5 µm, ellipsoidal or ovoid to almost limoniform, obliquely attached to the sterigma, refractive at the point of attachment.