Physarum tenerum

Physarum tenerum Rex, Proc. Acad. Phila. 1890: 192/ 1890
Physarum maculatum Macbr. Bull. Nat. Hist. Univ. Iowa 2: 383. 1893.
Sporangia gregarious, stipitate, spherical, erect or nodding, small, 0.3-0.4 mm. in diameter ; peridium single, membranous but thickly studded with circular, flattened, yellow, greenish y ellow or ochraceous gray flakes of lime, dehiscing by petal-like lobes; stalk 0.7-2.5 mm. long, subulate, slender, calcareous, opaque, pale yellow above, shading to darker below; columella none; capillitium delicate, the nodes yellow, small, rounded, connected by hyaline threads, many of the junctions often limeless; spores black in mass, violaceous by transmitted light, minutely warted, 8-11 /* in diameter; Plasmodium yellow or yellowish-green.
Type locality: Philadelphia, Pennsylvania.
Habitat: Dead wood.
Distribution: Throughout North America; cosmopolitan.

Physarum tenerum Rex, Proc. Acad. Phila. 1890: 192." 1890
Physarum maculatum Macbr. Bull. Nat. Hist. Univ. Iowa 2: 383. 1893.
Sporangia gregarious, stipitate, spherical, erect or nodding, small, 0.3-0.4 mm. in diameter ; peridium single, membranous but thickly studded with circular, flattened, yellow, greenish y enow or ochraceous gray flakes of lime, dehiscing by petal-like lobes; stalk 0.7-2.5 mm. long, subulate, slender, calcareous, opaque, pale yellow above, shading to darker below; columella none; capillitium delicate, the nodes yellow, small, rounded, connected by hyaline threads, many of the junctions often limeless; spores black in mass, violaceous by transmitted light, minutely warted, 8-11 yu in diameter; Plasmodium yellow or yellowishgreen.
Type locality: Philadelphia, Pennsylvania.
Habitat: Dead wood.
Distribution: Throughout North America; cosmopolitan.