Bean—The Myxomycetes of Wisconsin. 
1229 
large, the filaments short. The spores I find to be a rich, violet, 
9-10/a in diameter. 
T found this group in Cemetery woods, July 28, 1904, growing 
on decaying bark. 
Physarum variabile Eex. 
1893. Physarum variabile Eex., Proc. Phil. Acad., p. 371. 
Macbride (In part) : “Sporangia scattered, stipitate or sessile, 
globose, ellipsoidal, etc.; sporangium-wall of a dingy yellow or 
brownish ochre color, slightly rugulose on the surface, crustace- 
ous, brittle, rupturing irregularly, sometimes thin, etc.; stipes 
nearly equal, occasionally much expanded at the base, rugose, var¬ 
iable in size, color varying from yellowish white to dull brownish 
gray; capillitium a small-meshed network of delicate colorless 
tubules with large, many-angled, rounded masses at nodes; no 
columella, but often a central irregular mass of white lime gran¬ 
ules; spores dark violet brown, verruculose, 9-10y.” He adds 
that it differs from P. citrinellum in the size of the sporangium, 
the habit of fruiting, size, color, and marking of the spores; 
from P. melleum in having no columella; and from P. auriscalp- 
ium by having a much closer capillitium with paler nodules, as 
well as by much stouter habit, and the peculiar metallic or 
bronze yellow of the peridial wall. 
Lister describes it as glossy, yellowish-olive; the stalk conical, 
furrowed, yellowish-brown, densely charged wdth white lime- 
granules ; capillitium a close network of slender hyaline threads 
with membranous expansions at the axils of the branches; lime- 
knots numerous, irregularly branching, many large and con¬ 
fluent, wdiite or pale yellow. In other respects he does not differ 
from Macbride, whom I have but partially quoted. 
Massee does not describe this species. 
This is neither the bright yellow of P. auriscalpium , nor the 
honey-yellow of P. melleum. It is a dull light yellow with the 
stipe a trifle darker. The nodes in the sporangia that I have are 
few. large and irregular. The spores are pale reddish-brown 
9— 10u. 
We have one collection, made at Elmside, Madison, July 15, 
1904. 
