1 6 Kingo Miyabe . — On the Life-history of 
which correspond to Cladosporium herb arum , Lk. ; 2nd, the 
conidia didyma ; 3rd, those which correspond to Macrosporium 
Sarcimda , Berk.; and 4th, the Exosporium conidia {Alternaria 
tenuis , Nees.) 
Fuckel 1 , in 1869, added to the forms of Tulasne Epicoccum 
herb arum as one of the macroconidia of the plant. About the 
same time Hallier 2 claimed to have proved, by cultivations, 
that to Pleospora herb arum belong not only the six forms of 
Tulasne, but also a large number of others, namely, Penicil- 
lium grande, Rhizopus nigricans , Oidium lactis , an Aspergillus, 
a Mucor, Stachylidium , Fumago , Micrococcus , etc. 
In 1873 Gibelli and Griffini 3 undertook to prove by means 
of a large number of careful cultures, in closed chambers, the 
assertions of the preceding authors. They came to the con- 
clusions that Pleospora herbarum of Tulasne is to be divided 
into two distinct species, one constantly producing the Sar- 
cimda-conidia. (in which they included the second and third 
conidial forms of Tulasne) and the larger ascospores named 
by them Pleospora Sarcimdae ; and the other, always the 
Alternaria -conidia, accompanied by the perithecia having 
smaller and less-septate ascospores, called Pleospora Alter- 
nariae. They obtained pycnidia only twice in the cultures 
of the ascospores which produced the Sarcimda- conidia. The 
pycnidia thus obtained were shown to be distinct from Phoma 
herbarum ; and their pycnospores when sown constantly 
reproduced the pycnidia and nothing else. Cladosporium 
herbarum , Epicoccum , and Hallier’s forms, they proved to 
have no genetic relations at all with either of their species of 
Pleospora. 
They made also some observations on the development of 
1 L. Fuckel, Symbolae mycologicae, p. 130, 1869. 
2 C. Hallier, Untersuchungen des pflanz. Organismus, welcher die, unter d. 
namen Catiine bekannte Krankheit der Leidenraupen erzeugt. Potsdam, 1868. 
Die Muscardine des Kieferspinners, in Zeitschrift fur die Parasitenkunde, Bnd. i. * 
p. 18. 
3 G. Gibelli e L. Griffini, Sul polimorfismo della Pleospora herbarum , Tul.^ 
in Archivio Triennale del laboratorio di botanica crittogamica in Pavia, vol.i. pp. 
53-102, tav. v-ix. 1874. 
