Physarum melleum

Physarum melleum (Berk. & Br.) Massee, Monog. 278. 1892
Didymium melleum Berk. & Br. Jour. Linn. Soc. 14: 83. 1873. Didymium chrysopeplum Berk. & Curt.; Berk. Grevillea 2: 53. 1873. Physarum Schumacheri fi melleum Rost. Monog. Append. 7. 1876. Physarum Kalchbrenneri Massee, Monog. 297. 1892. Cytidium melleum Morgan, Jour. Cine. Soc. Nat. Hist. 19: 11. 1896.
Sporangia stipitate, gregarious, globose or somewhat flattened below, 0.4-0.5 mm. in diameter, usually yellow to dull orange, but varying from yellowish-gray to bright orange-red or brown; peridium rugose, encrusted with lime, persistent below; stalk cylindric or tapering upward, stout, opaque, white, yellow, or tawny, furrowed, calcareous, short, about equal to the sporangium; columella small, conic, white or yellowish; capillitium abundant, the nodes large. angular, white or yellow; hypothallus white or colorless; spores pale violet-brown by transmitted light, minutely warted, 7.5-10 ju in diameter; Plasmodium yellow.
Type locality: Peradeniya, Ceylon.
Habitat: Dead wood and leaves.
Distribution: Quebec to Oregon, south to Panama; cosmopolitan.