Serpula himantioides due to a lack of any above ground symptoms of disease. Signs of the pathogen include basidiospores, and fungal masses that are generally dark brown and membranous in the center but become thin white mycelium towards edges of the mass. The brown cubical rot caused by "S. himantioides" resembles the rots of "Phaeolus schweinitzii" and "S. lacrymans". "Serpula himantiodes" is a pre-harvest pathogen that exerts economic impact on lumber supply. It is considered the wild sister species of "S. lacrymans", the pathogen that causes dry rot in wooden building structures. "S. himantioides" is studied most frequently in the context of
Pulvinic acid acid, isoxerocomic acid, variegatic acid, variegatorubin, xerocomorubin, chinomethide, methyl bovinate, pulvinone, badion A, norbadion A, bisnorbadiochinone A, pisochinone, and sclerocitrin. Pulvinic acid Pulvinic acid is a natural chemical pigment found in some lichens. Dimers of pulvinic acid have been found in the fungi "Scleroderma citrinum" and "Chalciporus piperatus". Hydroxypulvinic acid pigments (pulvinic acid type family of pigments) have been found in "Boletus" (e.g. "Boletus erythropus"), "Boletinus", "Chalciporus", "Gyrodon", "Leccinum", "Pulveroboletus", "Suillus" (e.g. "Suillus luteus", "Suillus bovinus", and "Suillus grevillei"), "Paxillus" (e.g. "Paxillus involutus"), "Serpula" (e.g. "Serpula lacrymans"), "Xerocomus" (e.g. "Xerocomus chrysenteron"), "Hygrophoropsis" (e.g. "Hygrophoropsis aurantiaca"), "Retiboletus" (e.g. "Retiboletus nigerrimus"), "Pulveroboletus"