Spermogonia: unknown. Aecia: unknown. Uredinia: small, hypophyllous, sometimes mixed with telia. Urediniospores 17-20 x 14-19 µm, ovoid to ellipsoidal, the wall ca 1.5 µm thick (measurements in water), verrucose. Telia: small, hypophyllous. Teliospores 22-29 x 13-15 (measured in warmed lactic acid), the length/breadth ratio rather variable, ± clavate, 2-celled, hyaline to pale yellow, smooth, thin-walled.