Bean—The Myxomycetes of Wisconsin. 1267 
idia thin, sometimes fragile, but generally persistent, transpar¬ 
ent iridescent; hypothalius strongly developed, spongiose white, 
often projecting beyond the sethalioid mass of sporangia; spore- 
mass umber-brown or ferruginous; spores by transmitted light 
almost colorless, plainly reticulate over three-fourths of the sur¬ 
face, 6-7/x. Not rare on old logs, mosses, etc., from Maine to 
Alaska. Apparently more common north than south. Easily 
known by its long, tubular sporangia packed with rusty spores 
and destitute of any trace of columella or capillitium, the hypo- 
thallus explanate, rather thick, but not columnar. A single 
plasmodium may give rise to one or several colonies, at first 
watery or white, then red, of somewhat varying shades, then 
finally umber-brown. ’ ’ Macbride goes on to say that the peridia 
are sometimes acuminate, and widely separate above. In most 
cases, however, the peridia are connate throughout, and some¬ 
times present above a common membranous covering. 
Saccardo adopts the name Tubulin a cylindrica (Bull.) D. C. 
He calls the spores 5-6u in diameter. 
Lister differs from the above description in his measurement 
of the spores, which he gives as 7-9/x. He also says that the 
sporangia when immature and pulpy are of a beautiful straw¬ 
berry color. 
The two specimens which I have were found at Watertown, 
August 31, 1903. They were growing quite close together on 
the end of a decayed piece of wood. They are well-rounded 
masses about two-thirds and seven-eighths of an inch in diameter 
respectively, each on an inconspicuous white hypothalius. When 
found they were bright red. When fully ripe they become 
umber-brown. Macbride’s description seems accurate for these 
specimens. 
Later, on July 9, 1904, a mass of this species nearly covering 
a space 4 by 5 inches was found growing on much-decayed wood 
at Blue Mounds. Another small specimen I found at Blue 
Mounds, July 23, 1904. 
