SCHIZOMYCETES. IIACTKRIA I 21 



Pseudomonas malvacearum Krw. Smith. This parasite produces, 

 through stomatal infections, water-soaked, angular areas (\'"\g. 30), 

 known as angular leaf spot of cotton (( iossypium). Later these 



- V 



FIG. jo. ANGI I.AR LKAF SPOT OF COTTON. (Photograph by Krw in F. Smith) 



spots turn purple and finally become dry and brown. The disease 

 is apparently widely distributed in the southern states, but the 

 organism has not yet been fully described. 1 



X. PKAK BLIGHT 

 JitU'iUus amyloTonts ( IHirrill) I )e Toni 



ARTHUR, J. C. Diseases of the Pear. N. Y. Agl. Exp. Sta. Kept. 3 : 357-3 6 7- 



1884. 

 ARTHUR,]. C. History and Biology of Pear I'.li-ht. I'roc. Phil. Acad Nat. 



Sci. (1886): 322-341. pi. 3. 



BUKKILL, T. J. Trans. 111. State Hort. Soc. (i.S 77 ): i 14: ibid. (1878): 80. 

 BURRILL, T. J. Proc. Am. Assn. Adv. Sci. 29 : 5X3. iSSo. 



1 Smith, Erw. F. Bacteria in Relation to Plant 1 >is, 



