47 



Very characteristic of this Spicaria is its property of 

 imparting a red colour to some culture-media. 



T hâve not studied this property in détail, although I 

 am able to state, that a weakly allialine médium is co- 

 loured violet-red, a weakly acidic médium yellow-red. The 

 mycélium itself may also acquire the red colour. On 

 sterilized cacaowood and bark the mycélium yields an 

 abundant growth, but it also develops luxuriantly on ail 

 kinds of artificial média. 



In the course of my investigations I found another 

 fructification in a two-months old culture on cacao-bark, 

 namely pustules of Fusarium conidia. 



Hanging drop-cultures of thèse Fusarium-conidia were 

 started, so that the development could be watched under 

 the microscope. This appeared to be only possible in very 

 dilute solutions as otherwise the luxuriant growth of the 

 mycélium interfered with the observation. In water no 

 conidia were produced, but a saccharose-solution of J^ % 

 appeared to be suitable. In it the Fusarium conidia always 

 gave rise to a mycélium which produced conidiuphores of 

 Spicaria. In Fig. 8 the sown Fusarium cunidium is lying 

 at a; the Spicaria which has developed from it at ■. In 

 the numerous cultures I watched, I always found this 

 same course of development. 



The converse question now arose, namely, whether 

 Spicaria could produce Fusarium. To study this, I made 

 hanging drop-cultures of .Sp/carm-conidia. Thèse nearly 

 always developed a mycélium which produred the Spicaria- 

 fructification, but in rare cases the mycélium formed a 

 conidiophore with Fusarium conidia. (Fig. 9). 



Of the external conditions which influence the production 

 of the varions fructifications, light seems to be the most 

 important. In dishes with sterilized bark and wood which 

 had been inoculated with Spicaria, I nearly always found 



