Physarum compressum
Description:
SPORANGIA: scattered to gregarious up to 1.5 mm. tall, obovoid or reniform, compressed, splitting at the ridge, stalked, erect, or sessile and subglobose, sometimes confluent in clusters or forming plasmodiocarps, white or gray, rugose or spotted with white; sporangial wall membranous, colourless or purplish below, with clusters of white lime-granules on the outside.

STALK: when present, stout, long or short, furrowed, black from refuse matter, brownish, or white from included lime.

CAPILLITIUM: a close network with numerous small, usually rounded, white lime nodes, connected by short hyaline threads.

SPORES: Spores dark purplish brown, more or less faintly or strongly spinulose, 8-14 µm diam..

PLASMODIUM:
White.
HABITAT: On leaves, twigs, and dead wood.

DISTRIBUTION: Cosmopolitan, known from Northland, Auckland, Coromandel and Nelson.

Its not uncommon to come across some variations in this species.
Physarum compressum
Physarum compressum
Macro images:
Physarum compressum
Scale bar
Scale= 0.75 mm.
 
Physarum compressum
Scale bar
Scale= 1 mm.
 
Physarum compressum
Scale bar
Scale= 0.75 mm.
 
Physarum compressum
Scale bar
Scale= 1 mm.
 
Physarum compressum
Scale bar
Scale= 1 mm.
Immature fruiting body's
Physarum compressum
Scale bar
Scale= 1mm.
Another photo of Immature fruiting body's
Physarum compressum
Scale bar
Scale= 4mm.
PLasmodium:
Micro Images:
Physarum compressum
Scale bar
Magnification = 1000x
Spores:
 
Hidden Forest
Slime Moulds