Answers are grounded in this paper and cite their sources.
Production of crystals by Heterobasidion annosum (Fr.) Bref. (= Fomes annosus P. Karst.) and some other wood‐inhabiting fungi. The formation of crystals was observed on hyphae and in the medium during in vitro investigations of antagonistic interrelationships between Heterobasidion annosum and 16 other fungi. In monocultures only Calciumoxalate was found. A crystalline organic compound was produced by Heterobasidion annosum on its hyphae, only in the presence of an antagonist. The compound was characterized spectrometrically.
No takes yet. Share an insight, caveat, or question.
Ottmar Holdenrieder (1982) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: