SPORANGIA: Scattered, sessile, sub-globose or obovoid, 0.6 to 0.8 mm. diam., or forming curved or flexuose plasmodiocarps 2 to 6 mm. long, rounded or slightly compressed laterally, smooth, white or bufl, sometimes purplish brown below from absence of lime, or entirely limeless.
PERIDIUM: Wall double, the outer densely charged with white lime-granules, free and deciduous above, recurved and persistent below; inner wall smooth, membranous, pale purplish, more persistent.
CAPILLITIUM: A network of hyaline threads, with many variously shaped, large, smooth-walled, white nodes.