1)4 iowA ACAUv.y.v nf scn.xcf'.s. 



;![)ri( ot, thona'h oiilv on a few leaves. Little seems to have 

 been written about thi.s fungus. Prof. Arthur aav,. consid- 

 erable attention to it but it was first deseril)ed by Karsten, ' 

 ])ut I iind few European referenees. Pi'of. Peek' describcMJ 

 the fungus a,s Septi>r>a rrras/iia. Some specimens of th» 

 Iowa fung-ns were sent to ]Mr. Ellis who writes that lie com- 

 pared it with Karsten's (Ji/lhvh-ospon'Kiu paili with whicli it 

 agrees arid that UVM) of liis distribution is ai)[)arently the same 

 thins:. T\\Q specimens on plum collected by Aitluu' are cer- 

 tainly like the form on < herry only our specimens seem to be 

 a little more vigorous. Arthur"- considers Septoria pruni 

 Ellis, to be a synonym of S. rcra.suni. They are certaiidy 

 much alike and I think it is safer to refer these S(pfona' to 

 Cylimh'OHpovmm. padi Karst. 



The fungus may be l)rietly characterized as follows: Dull 

 or red spots make their ap[)earaucc on the upper surface of 

 the leaves in ^m\^ and July, later these beconu' brownish, 

 and on examination of the under surface of the leaf a yellow- 

 ish pustule is readily distinguished, ^^'hen mature, the e[)i- 

 dcrmal cells become ruptured and a large number of coloi-lcss 

 one-celled spores issue. The spcnes are borne on colorless 

 vertical threads, and usually collect in whitish [)atches near 

 the pustule. It is easily recognized by this character. 



Prof. Arthur considers this fungns to be connected with an 

 ascosp(n-ic form, which he has not naujed A more detailed 

 account of this stage was givtMi in his Sixth Report. The 

 conidia do not germinate readily, sevcu'al media were tried 

 but all j)roved unsuccessful. The leaves on the terminal 

 shoots are usually affected worse than any of the others. In 

 mahalel) the lower leaves on lateral branches are s[);)tted and 

 diseased. 



S_K.ii^i'i:. >\i;. \!\' . 1.1, \ \' y 1=0. Si-' .irdo, Syilos;e, KiiiiKonni ni. p. 7-;S. SoraiiT, 



ll.m, n l\i Mi KMiiirii, > 1 I <li;:i,'i, \c>l. II, p. 424 Roiimegiiere, Fungi F.uropaei pre-ipac 



,,ir ,\.:.,,ti. k.'vi." Msh,,1m-- pi.-, iSoS, p. IS. 



q— Twenty-N'inth Report New \\.tk State Mu-eum of Natural H story, p. 4S. 



10— l.oc. ot . 1385, p. :/97. 



