First Report of Bean Rust Caused by <i>Uromyces appendiculatus</i> Race 19-63 in Puerto Rico

Fig. 4. SEM of U. appendiculatus race 19-63 showing typical ornamentation of uredospores (2000×).



Image from Plant Health Progress article:
First Report of Bean Rust Caused by Uromyces appendiculatus Race 19-63 in Puerto Rico