Physarum cinereum (A slime mould)

Grenerally found growing on grass or in pasture. Has been known to grow on potato crops in some countries.

Plasmodium:- pale white watery, then first appearance is quite black on the green grass.

Sporangia:- sessile,subglobose, heaped, crowded,  forming simple or branched plasmodiocarps, 0.3 to 0.5 mm. broad, cinereous, more or less warted or veined with white.

Peridium:-  single, thin, membranous, with included densely coated clusters of white lime granules.

Capillitium:- abundant with branching hyaline threads.

Spores:-  brownish lilac.