A–H. Uromyces hawksworthii (UB Mycol. Col. 22875): aecidial gall development and morphology of the aecia, A. Early stage of gall formation. B. Intermediate stage of two galls. C. Two mature galls bearing numerous aecidia. D. Cross section through a developing aecidium. E. Aecidia after aeciospore release. F. Peridium internal texture. G. Aeciospores. H. Detail view of the aeciospore wall. Bars: A–C = 2 mm, D = 50 µm, E = 300 µm, F = 20 µm, G = 10 µm, H = 1 µm.