Physarum rigidum

Physarum rigidum (G. Lister) G. Lister in Lister,
Mycet. ed. 3. 36. 1925.
Physarum viride var. rigidum G. Lister in Lister, Mycet. ed. 2. 56. 1911.
Sporangia stalked, gregarious, lenticular, often umbilicate above, yellow, dull orange, or
iridescent from lack of lime; stalk slender, orange or yellow above, dark below from included
amorphous matter, 0.3-1.5 mm. long; capillitium of sparingly branched threads with long
orange-yellow nodes, or consisting almost entirely of slender, rod-like tubes enclosing yellow
lime granules; spores rich violet-brown, minutely spinulose, 9-10 m in diameter; Plasmodium yellow.
Type locality: Japan.
Habitat: Dead wood and gelatinous and .fleshy fungi.
Distribution : The, West Indies ; Central Africa ; southern and eastern Asia.