Ii8 TEXT-BOOK OF FUNGI 



by such species when mature, serves to guide the animals 

 to their whereabouts, and thus the spores are disseminated. 



Spores are often dispersed by slugs and snails, by crawl- 

 ing alternatively over diseased and healthy parts of plants. 

 Mites, flies, birds, mice, etc., carry spores adhering to their 

 bodies, from one place to another; and probably are 

 frequently the unconscious cause of a new infection, or the 

 rapid spread of an epidemic due to fungi. 



In one instance I was able to prove that a serious out- 

 break of disease caused by a fungus originated in the 

 injured plants being inoculated by spores that had been 

 blown into an open rain-water tank, the water from this 

 tank being used for spraying. Consult the chapter on 

 * Liberation of Spores and Conidia,' in connection with 

 this subject. 







Fulton, Ann. Bot., 3, p. 213 (1899). 



Rathay and Haas, Nat. Akad. d. Wissensch.^ 58, p. 18 



Voglino, Nuovo Giorn. Bot. ItaL, 1895, p. 181. 



Falck, * Die Sporenverbreitung bei den Basidiomyceten 

 u. der biologische Wert der Basidie,' in Cohn's Beitr. Biol. 

 d. Pflanzen (1904). 



MINERAL FOOD OF FUNGI 



According to Errera the elements necessary for organic 

 life have low atomic weights, Fe. 56 being the highest. 



projecting mouths of the perithecia : the section shows the 

 numerous perithecia sunk in the fleshy stroma.; 6, an 

 ascus containing eight needle-shaped spores ; 7, a single 

 spore. Figs, i and 2, nat. size ; the remainder mag. 



