Dean—The Myxomycetes of Wisconsin . 
1243 
My specimens agree very closely with the descriptions given. 
They vary in length from 1V> to 4 cm. The spores are dark 
violet, strongly spinulose, from 12 to 1.5ft in diameter. 
Three specimens surrounding small stems were found in Madi¬ 
son. October 14, 1899, and two in campus woods July 14, 1904. 
One of the latter is nearly globular and is formed on the extreme 
end of the stem of a dead oak leaf; the other is irregular, upon 
the base of another dead oak leaf. The other specimen which 1 
have nearly surrounds a hardwood twig, and was found at Blue 
Mounds, July 23, 1904. 
Didymium squamulosimi (Alb. and Schw.) Fries. 
1805. Diclerma squamulosum Alb. and Schw., Gonsp . Fling., 
p. 88. 
1829. Didymium squamulosum (Alb. and Schw.) Fries, tsyst. 
Myc., III., p. 118. 
Macbride: “Sporangia in typical forms gregarious, globose or 
depressed globose, gray or snow white, stipitate; the peridium a 
thin iridescent membrane covered more or less richly with minute 
crystals of lime; the stipe when present, snow white-, fluted or 
channeled, stout, even ; columella white, conspicuous; hypothallus 
small or obsolete; capillitium of delicate branching threads, 
usually colorless or pallid, sometimes with conspicuous calci- 
form thickenings ; spores: violaceous, minutely warted or spinu¬ 
lose, 8-10,u. ’ ’ He adds that this is one of the most beautiful 
species in the whole series, and is remarkable for the variations it 
presents in the forms of the sporangia, in hypothallus, in capilli¬ 
tium ; and he describes the different forms that have come under 
his observation. 
Lister gives details of the variations, but does not otherwise 
differ from Macbride. 
Massee also agrees in general with the above. 
We have the gray and the white forms, the stipitate and the 
sessile. In some sporangia where the peridium is broken away, 
the columella can easily be seen with a hand-lens. I find the 
spores 8-10y in diameter. 
Six of our collections were made in June and July, 1904, and 
the seventh in March, 1904, on a few straws in a laboratory. All 
but one were collected in Madison, one at Blue Mounds. Most 
of them are on dead oak leaves, found in the woods or on lawns. 
