FIGURE 4 in Gymnosporangium przewalskii sp. nov. (Pucciniales, Basidiomycota) from China and its life cycle

FIGURE 4. Spermogonial and aecial stages of Gymnosporangium przewalskii on Sorbus koehneana (BJFC-R02083). A. Vertical section of a spermogonium. B. Aecia on the abaxial leaf surface. C. An enlarged view of aecia. D. Aeciospores. E. Surface structure of aeciospores. F. Minutely coronate processes on the aeciospores surface. G. Peridial cells. H. Moderately rugose processes on the inner wall of the peridial cells. I. Moderately rugose processes on the side wall of the peridial cells. Scale bars: A = 30 μm; B = 3 cm; C = 1 mm; D = 30 μm; E = 10 μm; F = 1 μm; G = 60 μm; H, I = 3 μm.