Ravenelia piepenbringiae. A Telia in chlorotic spots associated with infection of Senegalia hayesii B, C sori showing uredinio- and teliospores and teliospores, respectively D SEM image of a telium E SEM view of a teliospore F, I LM images of teliospores G SEM image of urediniospores showing equatorially arranged germ pores H drawings of urediniospores. Scale bars: 3 mm (A); 0.1 mm (B); 0.2 mm (C); 40 mm(D); 10 mm (E); 20 mm(F); 5 mm(G); 10 mm(H); 20 mm(I).