Sporangia scattered or gregarious, globose or depressed-globose, or reniform, iridescent-blue, mottled with various tints, red, orange, yellow, white, stipitate; stipe equal, or tapering slightly upward, rugose, orange or orange red, without lime, rising from a small concolorous hypothallus; columella none; capillitium dense, crowded with calcareous, brilliant orange nodules which are angular in outline and tend to aggregate at the centre of the sporangium; spore-mass brown; spores by transmitted light, pale brown, slightly but plainly warted, about 10 mu. _N. A. F._, 2492. Differs from _P. pulcherripes_ Pk. in external coloration, the peridium a rich blue, mottled but not with lime; in the capillitium, dense, calcareous, with large angular or branching nodes; in the stipe without lime; in the spores, a little larger than in _P. pulcherripes_, and by transmitted light much more distinctly brown in color. The sporangia are also broader in the present species, reaching 1 mm. Rare. Maine, New York, Massachusetts, Pennsylvania. Reported common in Europe, Ceylon, Japan, etc. 32. PHYSARUM DISCOIDALE _Macbr. n. s._ PLATE XX., Figs. 3 and 3 _a_. Sporangia gregarious, scattered, discoidal, depressed or umbilicate above, sometimes almost annulate, snow-white, small, .5-.7 mm., stipitate; stipe about twice the sporangium, pale yellow, strand-like, but erect, even; hypothallus none; columella none; capillitium strongly calcareous, almost as in _Badhamia_, aggregate at the center, and forming a pseudo-columella at the base of the peridium; peridial wall firm, covered with innate patches of lime, somewhat yellow at the base; spores minutely spinulose, violaceous, 7-9 mu. This little species reaches us from California. It appears in late winter in undisturbed grass tufts and the sporangia are scattered over the lower leaves. It displays a remarkable amount of lime. The nodules, however, are not large; they are rounded and connected here and there by the ordinary retal tubules characteristic of a physarum. 33. PHYSARUM LEUCOPHAEUM _Fr._ 1818. _Physarum leucophaeum_ Fr., _Symb. Gast._, p. 24. 1875. _Physarum leucophaeum_ Fr., Rost., _Mon._, p. 113, Figs. 77, 78. 1899. _Physarum leucophaeum_ Fr., Macbr., _N. A. S._, p. 21. 1911. _Physarum nutans_ Pers., sub-species _leucophaeum_ (Fr.) Lister, _Mycet., 2nd ed._, p. 67. Sporangia scattered or gregarious, stipitate; the peridium globose or sub-depressed, plano-convex, but never umbilicate below, erect, bluish-ashen; the stipe short, rugose, sub-sulcate, fuscous, brown, or sometimes almost white, even or slightly attenuate upward from a thickened base or sometimes from an indistinct hypothallus; capillitium dense, intricate; the nodules white, with comparatively little lime, thin, expanded, angular or branching; columella none; spore-mass black, spores violaceous, minutely roughened, about 8-10 mu.