CHROMOGENIC FUNGI WHICH DISCOLOR WOOD. 81 



Boulanger * has proven by the use of careful cultural 

 methods that Sporotrichum chlorinum Link var. grisea 

 Boul. is a stage of Graphium eumorphum Sacc. This dis- 

 covery is now verified by the present investigation, and 

 Sporotrichum-Wke stages of other species of Graphium are 

 now published for the first time. Boulanger also discov- 

 ered a Sporotrichum stage of Chaetomium cuniculorum, 

 and obtained fruits of the latter fungus in connection with 

 Graphium, indicating that Chaetomium cuniculorum is 

 the perfect stage of the other two fungi. We have not 

 been able to verify the latter relationship. 



Graphium giganieum (Pk.) Sacc. is given by Durand t 

 as a conidial stage of Holwaya gigantea (Pk.) Durand. 



Zopf \ observed a moniliform conidial stage of Chae- 

 tomium which failed to germinate. He makes no mention 

 of finding any related forms of Sporotrichum. 



Some of the species we have studied contain both Sporo- 

 trichum forms and moniliform fruits, the latter resembling 

 very much the branching clusters of the conidial stage of 

 Ceratostomella. 



From the study of several species of Graphium the fol- 

 lowing cultural characters are found to be common: — 



Mycelium. 



The mycelium in a culture from either of the two spore- 

 forms found in the species studied is from the first hyaline 

 and septate. On rich vegetable-decoction agar, like that 

 made from green pine sapwood, bean pods, potato, etc., a 

 fluffy white mycelium is usually produced, varying in 

 density with the medium and the species. The first form 

 of conidia is borne on erect hyphae, which may be either 

 simple or branched. These hyphae or conidiophores 



* Boulanger. Rev. Gen. de Bot. 1805 : 97-102. 

 t Durand, E J. Bull. Torr. Bot. Club. 28: 351. (1901). 

 X Zopf, W. Ueber Pilzfarbstoffe. III. Bot. Zeit. 47 : 86-89. (1889). 



G 



