Bean—The Myxomycetes of Wisconsin. 
1223 
Ceratiomyxa fruticulosa (Muell.) Macbr. 
1775. Byssus fruticulosa Mueller, FI. Ban., t. 718, fig. 2. 
1889. Ceratiomyxa mucida Schroeter, Eng. u. Prantl Nat. 
Pflanz., I, i. p. 16. 
Macbride: ‘ ‘ Plasmodium in rotten wood, white or nearly trans¬ 
parent; when fruiting, forming on the substratum mold-like 
patches composed of the minute sporiferous pillars, generally in 
clusters of three or more together; spores white, ovoid or ellip- 
sodial, smooth, 10-12 x 6/x. ” 
Saccardo adopts the name Ceratium hydnoides (Jacq.) Alb. 
and Schw. He gives the color as white or yellow, and the spores 
as ovoid, 10 - 12 , 0 , by Sy, or globose, 10y in diameter. He finds 
the spores to be minutely guttulate and hyaline. 
Lister: 41 Sporophores white or pinkish yellow, membranous, 
either rising from a common hypothallus in a tuft of simple or 
forked, fasciculate obtuse branches, 1 mm. or more high, .07 mm, 
thick, or more or less interwoven in broad perforated bands, from 
which arise irregular and anastomosing lobes; the membranous 
wall is divided, chiefly on the upper part of the sporophore, into 
somewhat hexagonal areolae about 10,a broad; a membranous stalk 
bearing the spore arises from the center of each areola. Spores 
10x6 to 13x7 i u. M 
The above descriptions are excellent for this species. I find 
spores that are ovoid or ellipsoid, 8-11 by 6-8/x, and globose ones 
10-11/ji in diameter. 
I found a small specimen of this species in Cemetery woods 
October 14, 1903. In February, 1904, some chips under a bell- 
jar in the herbarium room produced some of this species, giving 
me good material for microscopic preparations. April 25, 1904, 
in the greenhouse, a piece of decayed poplar 3 ft. by 6 in. sud¬ 
denly became nearly covered with the fruiting bodies. It looked 
like a small snow-drift and was a beautiful sight. Since then 
this species has frequently appeared in the greenhouse. On May 
27, 1904, a quite large log of decayed poplar became nearly cov¬ 
ered with specimens of this species of a clear sulphur yellow, ex¬ 
cepting at one end of the log, where they were white. The yel¬ 
low did not gradually fade out to white, but the colors were 
