Dean—The Myxomycetes of Wisconsin. 
1235 
bear off the sooty spores, and naught remains but twisted yellow 
stems crowned with a pencil of tufted silken hairs. August. ” I 
have quoted but part of Macbride’s description. 
Lister uses the name Physarum polycephalum Schw. He finds 
the sporangia stalked, compressed vertically, lenticular, undulate 
or lobed, confluent in clusters of five to ten together, grey or 
yellow; capillitum a loose network of slender threads with many 
flat expansions at the axils; he finds the spores violet-brown, 
minutely spinulose, 8-10/* in diameter. 
Massee does not describe this species. 
The little sporangia with their irregular convoluted tops make 
the species a noticeable one. I have a collection on a green com¬ 
pound leaf of three leaflets; the upper surface and the stem are 
completely covered, and the under surfaces more than half cov¬ 
ered with these odd little forms. 
We have but this one collection which came from Winnequah, 
July 22, 1905. 
Tilmadoehe alba (Bull) Macbr. 
1791. Sphhaerocarpus albus Bulliard, Champ., p. 137, etc. 
1899. Tilmadoehe alba Macbride, N. — A. S. — M., p. 58 
Macbride: “Sporangia gregarious, depressed spherical, stipi- 
tate, umbiiicate, gray or white, thin-walled, nodding; stipe long, 
tapering upward, brown or ashen-white above, lightly striate, 
graceful; capillitium abundant, threads delicate, intricately com¬ 
bined in loose persistent network with occasional minute, 
rounded, or elongate calcareous nodules; spores minutely rough¬ 
ened, globose, about 10/*. The nodding, lenticular, umbiiicate 
sporangium, barely attached to the apiculate stipe, is sufficient 
to distinguish this elegant little species. The stipe is usually 
white above, fuscous below, at the apex almost evanescent; hence 
the cemuous sporangia.” 
Lister calls this species Physarum nutans. His description 
does not differ from that of Macbride in any important detail. 
Massee adopts the name of T. nutans Rost. He notes that the 
thin greyish or white walls, having a thin layer of minute amor¬ 
phous lumps of lime, become irregularly cracked; that there is a 
small hvpothallus; the spores pale lilac, smooth, or very minutely 
verniculose, 9-11/x. 
