OIMPIIALIA FLAVIDA 



403 



Stilbum flavidum Cke., as we 

 shall see, has nothing to do with 

 the genus Stilbum but is merely a 

 stage in the life-history of Om- 

 ])halia flavida (Cke.) Maublanc et 

 Rangel. 



In 1914, Maublanc and Rangel ^ 

 obtained some spotted leaves of 

 the Loquat, Eriohotrya jajwnica, 

 at Rio de Janeiro and placed 

 them in an atmosphere saturated 

 with water-vapour. On the surface 

 of the spots there developed first 

 of all a crop of Stilbum flavidum 

 fruit-bodies and subsequently the 

 much larger fruit-bodies of a small 

 agaric to which they gave the name 

 Omphalia flavida. Similar results 

 were obtained with the leaves of 

 undetermined species of Melasto- 

 maceae and Compositae. Because 



(1) the leaf-spots frequently pro- 

 duced the Stilbum and the Om- 

 phalia in succession, and because 



(2) the two fungi showed marked 

 resemblances in colour and general 

 structure, Maublanc and Rangel 

 concluded that Stilbum flavidum Cke. 



Fig. 202. — Numerous gemmifers on a leaf 

 of Nerium Oleander artificially inocu- 

 lated with Omphalia flavida. The 

 same leaf as the one on the left in 

 Fig. 201 photographed 10 days later 

 and 29 days after inoculation with 

 gemmae. The divergence of the 

 gemmifers from one another can 

 again be well seen. Natural size. 



^ A. Maublanc ct E. Rangel, " Le Stilbum flavidum Cooke, forme avortee de 

 V Omphalia fluvida n. sp.," Bull. 80c. Myc. France, T. 30, 1914, pp. 41^7. 



