Dean — The Myxomycetes of Wisconsin. 
1231 
poplar. I have specimens from Blue Mounds gathered October 
12,1901; from Dead Lake, October 1903; several gatherings from 
Cemetery woods during the last ten days of October, 1903; and 
from Vilas woods, July 16, 1904. 
In the winter of 1912-13 tobacco stems which had been put on 
the plant benches of the greenhouse of the Biology Building bore 
a large crop of P. nefroideum, all the sporangia of which were 
distinctly reniform, many of them being also bent into a crescent 
shape laterally. They were very dark gray in color. 
Physarum globuliferuni (Bull.) Pers. 
1791. 8 ph aero carpus glo'buliferus Bulliard, Champ., pi. 484, fig. 
3. 
1801. Physarum globuliferum Pers. Syn., p. 175, t. III., figs. 
10 - 12 . 
Macbride: “Sporangia gregarious, stipitate, globose, or 
slightly depressed above, pale gray or pure white; stipe some¬ 
times equal to the sporangium, generally longer, slender, slightly 
wrinkled, white or yellow, pallid, when longer tapering upward! 
columella white conical, sometimes obsolete; hypothallus none; 
capillitium dense but delicate, persistent, a close net-work of hya¬ 
line threads, with white or yellowish nodes sparingly thickened 
and calcareous, many without lime; spore-mass brown; spores by 
transmitted light violet, minutely warted, 7.5-9y.” 
Lister’s description varies but little from the above. He says 
that sometimes the stalk is red-brown towards the base, that the 
capillitium is persistent, retaining the form of the sporangium 
after the dispersion of the spores; that the spores are violet- 
brown, almost smooth, 6-8y in diameter. 
Massee says that the sporangia are grayish; the stem equal to 
the sporangium or twice as long, rigid, fragile, white, sulcate; 
columella large, cylindrical, obtuse, white; vesicles containing 
lime in the capillitium are numerous, of variable size, yellowish 
or reddish: spores smooth, 9-11 y. in diameter. 
In my collections I find the long, slender, wrinkled yellow 
stipe; I find the persistent capillitium ; other characteristics agree 
with Macbride’s description. 
One collecton was made at Blue Mounds, July 1904, growing 
