202 ARTHUR-BISBY— TRANSLATION OF SCHWEINITZ'S 



come, in accordance with the rules of priority, Cercospora Teucrii 

 (Schw.) comb. nov. 



2838. 28. C. U. Azaleae, L.v.S., Syn. Car., 470, [as U.] minima, frequent on 



leaves of Azalea nudiflora, Bethlehem and Salem. 

 C. spots obsolete. Sori on the lower surface, at first somewhat cone 



shaped, minute, orange, finally effused. Spores very minute, 



losing their color, and unequal, pyriform, with globose forms 



intermixed. 

 (470. 12. [Uredo] minima Sz. 



U. very minute, punctiform, pale orange, sparse, peridia 

 subconic. 



Frequent on the lower surface of the leaves of Azalea nudi- 

 flora.) 



Represented by a mounted leaf 2 by 6 cm., thickly covered on 

 the lower surface with uredinia corresponding to the description, 

 and by an empty packet labelled inside " Uredo farinosa ^ minima 

 in Azalea nudif Salem," together with the later name " Cseoma 

 minimum," written above, and on the outside " Cseoma (Ur) AsalccB 

 LvS. Beth & Sal." 



The rust is the uredinial stage of Piicciniasiriim minimum 

 (Schw.) Arth., as reported in the " North American Flora" 7: 109. 

 1907, a name now believed to be synonymous with P. Myrtilli 

 (Schum.) Arth., a rust occurring upon various species of Vac- 

 cinium, as well as on Azalea nudiflora L., and other Ericaceous 

 hosts. 



3. Fuscentes and Nigredines (Browns and Blacks). 



2839. 29. C. U. Ari virginici. L.v.S., Syn. Car., [as U.] Caladii, 480, Lk. n. 



21. It is not Caladium but Arum on which this is frequently 



found and in Pennsylvania. 

 (480. 22. [Uredo] Caladii Sz. 



U. punctiform, solitarj', seated on large yellowish spots, the 

 spore-mass fuscous. 



Frequent on the under side of the leaves of Caladium. Peridia 

 at first closed, at length scattering the spores.) 



Represented by a 3 cm. square portion, cut from a large leaf, 

 mounted, showing uredinia scattered over the surface, and by an 

 empty packet labelled inside " Uredo Caladii Salem," and outside 

 " Cceoma Ari virginici LvS. n. Caladii Salem." 



