SUMMARY
Developmental stages and associated microstructural features of abnormal basidiocarps typically formed by Gloeophyllum saepiarium in culture are described and compared with those observed in nature. Liquid and agar culture media failed to provide the necessary environmental conditions that regulate normal hyphal differentiation and orientation. Periodic desiccation of mycelium on naturally infected wood blocks and inoculated wood blocks was found to be necessary for normal basidiocarp development. A cultural procedure to induce normal basidiocarp development is described.