The North American Slime-Moulds / A Descriptive List of All Species of Myxomycetes Hitherto Reported from the Continent of North America, with Notes on Some Extra-Limital Species

by Thomas H. Macbride

Reported from Ceylon, Japan, West Indies; Lisbon.

Physarum gulielmæ Penzig.

• 1898. Physarum gulielmae Penzig., Myx. Beut., p. 34.
• 1909. Physarum gulielmae Penzig., Torrend, Fl. des Myx., p. 208.
• 1911. Physarum gulielmae Penzig., List., Mycetozoa, 2nd ed., p. 76.

Plasmodium yellow; sporangia sub-globose, sessile, brownish-orange or chestnut brown, rugulose, clustered or heaped, often with a yellow membranous hypothallus; peridium membranous with clustered deposits of yellowish-brown lime granules; capillitium abundant, the nodes angular, branching, white; spores purplish brown, spinulose, 10–12 µ.

Reported from Java, Sweden, Switzerland.

Physarum echinosporum List.

• 1899. Physarum echinosporum List., Jour. Bot., XXXVII., p. 147.

This species is distinguished from the preceding chiefly in episporic characters. "Spores purple, 8 µ, marked by strong ridges and spines," 8 µ.

Reported from Antigua.

Physarum æneum (List.) R. E. Fries.