i9o8] EDGERTON—ANTHRACNOSES 401 



show a few branched threads entirely outside of the asci; apparently 

 these are the same as are seen in other forms of GlomercUa. 



The question of specific names is the most difficult one. We have 

 a multitude of closely related forms with a greater number of names. 

 WTiat are we to do with all of these forms ? If they were fixed and 

 would vary but little or practically not at all, as seems to be the case 

 with forms of Penicilhum, it might be well to call them species, or 

 at. least varieties. But when it is difficult to find two collections with 

 the same characters, or to find a form that will not vary on culture 

 media, what is to be done with them? There seems to be httle 



some 



should be reduced to synonyms; but it also seems that some of the 

 forms are widely enough separated to be considered distinct species. 

 It hardly seems possible that a form that produces large, hairy, steel- 

 gray pustules when gr..wn on apple, as Sheldon (37; has described 

 for the guava anthracnose, and as is also the case with at least one 

 form from the orange, could be put in the same species with the one 

 originally found on apple, from which no such a pustule forms. 



Shear and Wood (40) believe that all the forms whose perfect stage 

 has been found form ^ single species or at most varieties of one species. 

 They say that all will be considered by ihem as Glome rella rufomaculans 

 or varieties of it. Their use of names, however, is not always con- 

 sistent. They use rufomaculans because it is the first name u.-.ed for 

 c ni/^^«o,^^T-i*,iTv, ^r, r, v,r»H r»f wViirli tTif nprfoct stacre has been found. 



mean to use the first 



How 



Miss 



7.-, 



species as if she were responsible for the specific name, as, for instance, 

 Glomerella cingidafa (Stoneman) Sp. & v. Schr. To have been 

 consistent with their use of the name rujomaculans, they should have 

 used Glomerella cingidata (Atk.) Sp. & v. Schr. Atkinson (4) 

 named the conidial stage and that was the first name. There is 

 great difficulty in getting the right name for these forms. If we use 



name 



Shear and Wood, that all of these forms are the same thing, we must 

 use the name Glomerella cingidata (Stoneman) Sp. & v. Schr. But 

 if we follow the other sv^tem of using the earliest name applied to 

 any stage, we are in great difficulty. If we follow the latter, we may 



