AN EXDOMYCES FROM AFPLE. 47 



The chief interest in its study hes in the fact that it belongs 

 to a family of fungi no representative of which has been re- 

 ported from i\merica so far as the writer is able to determine. 

 The character of producing spores in sacs or asci on short 

 branches of the mycelium places it in the family Bndoniycctaceae 

 and the fact that the 4 spored ascus is formed from a single 

 branch and not from a fusion of two branches places it in the 

 genus Endomyces, according to the classification of Schroter 

 (12). The fungus under consideraticn, however, differs from 

 the described species of Endomyces in certain morphological 

 and cultural characters. 



Endomyces decipiens (Tulasne) Rees, which ocurs as a para- 

 site on Armillona mellea Vahl, has asci which are 12-13 x 17 

 microns. This species produces chlamydospores which are 10- 

 12 X 15-17 microns, and the mycelium breaks down to form 

 oidia. Endomyces Magnusii Ludwig was described by Ludwig 

 and was later studied by both Brefeld (2) and Hanson (6). It 

 occurs in fermenting sap of the oak in Germany. The cells of 

 the mycelium of this species separate very readily to form oidia. 

 The asci do not develop in culture under ordinary condition? but 

 Brefeld secured them by growing the fungus so that the my- 

 celium was deeply buried in gelatin. The asci are large, being 

 25 X 40-45 microns. Endomyces scyfonematiim Zukal produces 

 asci which are 17-18 x 25-26 microns. Each ascus contains 8 

 spores. Endomyces inelioUncola Rehm has asci which are 45 

 microns in diameter. Endomyces coprophilus Massee and Salm. 

 has asci which are 18-25 x 20-30 microns and contain 4-8 sjic^res. 



Ejidomyces parasiticus Payod occurs as a parasite on Trich- 

 oloina nttilans. The hyphae are 2-3 microns in diameter, the 

 asci are somewhat pear shaped, are 12 microns \n length and 6-7 

 microns across at the broad end. This species dift'ers from 

 Endomyces decipiens and Endomyces }fai:;)nisii in producing 

 conidia which are cut off' irom the end of a slender cdnidii^iiihore 

 and in the fact that the mycelimn (U.es n 't break down tti \ovn\ 

 oidia. 



The fungus which was isolated from a'^ple, when grown uium 

 a number of culture media, produces hyaline one-celled ciinidia 

 after the manner shown in Fig. 66. The conidia vary somewhat 

 in size, being 3-3.5 x 6-10 microns but for the most part mature 

 conidia are about 3x8 microns. The hyiihac vary in thickness 

 from 3 to 6 microns. The asci are as a rule almost spherical. 



