Physarum leucophaeum

On plant debris such as small stems or wood, with stalked sporocarps 1 to 1.5 mm in total height, with subglobose to lenticular (slightly flattened at the base) sporothecae 0.4 to 0.8 mm in diameter, white or bluish grey; stipe occupying half the total height of the sporocarp, dark reddish brown, with white lime deposits on its surface.

Peridium single, membranaceous, hyaline, evanescent, greyish, with white scales, persisting at the base as a disc or shallow cup.

Columella absent.

Capillitium abundant, formed by numerous white lime nodes, occasionally forming a pseudocolumella, these nodes connected by slender, short, hyaline filaments.

Spores globose, greyish brown under the microscope, 11 to 13 µm in diameter, finely verrucose, ornamented with numerous very fine, darker warts distributed more or less evenly across their entire surface.

Herbarium material available: JTP2431/25.