Bean—The Myxomycetes of Wisconsin. 
1239 
Badhamia rubigin&sa (Chev,,) Rost. 
1826. Physarnm rvbiginosuw, Chevalier, FI. Par., p. 338. 
1876. Badhamia rubiginosa (Chev.) Rost., Mon. App., p. 5. 
Macbride: “Sporangia gregarious, obovoid, grayish brown, 
stipitate, the peridium simple, membranous, above thin, pale, 
more or less calcareous below, persistent, blending with the 
stipe; stipe erect, reddish-brown or purplish, expanded below 
into a small hypothallus, above prolonged within the sporangia 
more than half its height as a definite columella ; capillitium very 
dense snow-white, long persistent with the lower two-thirds of 
the sporangia! wall; spore-mass dark brown; spores by transmit¬ 
ted light dark violet or purple brown, minutely roughened or 
spinulose, not adherent, 12-14y.’ ? 
Lister differs but little from Macbride. He says the sporangia 
are rarely sessile, columella clavate or cylindrical, capillitium a 
white or pale rufous rugged network, usually densely charged 
with lime-granules, sometimes with a few hyaline connecting 
threads. 
Saceardo: “Peridia round-top-shape, stipe slender; spo- 
range twice as broad as it is long; reddish-brown, smooth, 
shining; columella distinct, cylindrical, firm, dark, formed from 
the elongated stipe; capillitium very much unrolled, white; peri¬ 
dium opening with a delicate dehiscence; spores violet, 14-15/a, 
scarcely wanted. ’ ’ 
The different forms which I have agree in general with the 
description by Macbride. The hypothallus is very prominent 
and of a greenish-brown. As many of the sporangia are imma¬ 
ture, I think the prominent hypothallus may be but a portion of 
the plasm odium arrested in its development. The spores are 
12-14/a in diameter and are distinctly spinulose. 
M T e have but one group of sporangia, found at Blue Mounds, 
July 8, 1905. 
