100 MISSOURI BOTANICAL GARDEN. 



cladosporioides (Fres,.) Sacc. and Cladosporium herbarum 

 Link are identical. In some of our cultures forms inter- 

 mediate between the two, and identical with the latter, were 

 present (pi. 10, f. 1), but in no case were septate conidia 

 noted, such as are given in the description of C. herbarum, 

 the septation being confined to the hyphae which bear the 

 conidia. If, however, the modified hyphal branches be 

 mistaken for conidia, it is easy to assume them to be the 

 septate conidia of Cladosporium. Time was not had to 

 apply all the culture methods and media of Planchon to 

 our species. Enough of the forms described by him in his 

 study of these two fungi have been found in our cultures 

 to verify his work ; but the question still remains as to 

 whether he is correct in assuming the fungus to be a Clad- 

 osporium. This hinges upon whether the conidia-like 

 branches bearing the conidia may themselves function as 

 conidia ; but even this might not settle the question, since 

 it is a well-known fact that in most of our imperfect fungi 

 any portion of the young mycelium when broken up may 

 be able to reproduce the fungus. This being the case, we 

 will for the present use the name Hormodendron here to 

 designate our plant. 



Hormodendron griseum n. sp. 



The other species of Hormodendron studied was found 

 growing on the wood of Liquidambar Styracifiua L., Pinus 

 echinata Mill., and Fraxinus Americana L. The colonies 

 of this species on both wood and agar media were of greater 

 height, and of a different color when mature, as compared 

 with those of H. cladosporioides. The mycelium is often 

 hyaline, or nearly so in many portions, giving the colony 

 a gray appearance, even though the conidial clusters are of 

 a dark olive color. These two species of Hormodendron 

 were grown carefully for nearly a year in parallel sets of 

 cultures, with no reversion of the one type to the other, 



