Sistotrema muscicola (Pers.) S. Lundell

Basidiocarps poroid, yellowish; resupinate, effused in small patches; fragile, loosely attached to substrate; margin white cottony to fimbriate.

Subiculum very thin, white, soft, cottony to arachnoid.

Basidiospores subglobose to ellipsoid or broadly ovate, smooth, hyaline, Melzer negative, 3.5-5.5 × 2.5-3.5 µm.

Hyphal system monomitic; subicular hyphae with conspicuous clamps, hyaline, thin-walled ^[61] (in my specimen rather thick walled), some ampulate, commonly lightly encrusted with coarse crystals; 2-5 µm thick.

Cause white root of dead conifers and hardwoods.

Rare. On dead wood of conifers and hardwoods, also among mosses and leaf litter on the soil surface.