FIGURE 1 in Phyllosiphon ari sp. nov. (Watanabea clade, Trebouxiophyceae), a new parasitic species isolated from leaves of Arum italicum (Araceae)

FIGURE 1. Morphology of Phyllosiphon ari sp. nov. A–B. A leaf of Arum at different stages of infection caused by Phyllosiphon ari. C. Branching filaments in the leaf parenchyma containing endospores. D. Detail of P. ari endospores released from filaments. E. Autosporangium of P. ari, strain N8. F. Vegetative cells with a remnant of the mother cell wall, strain N8. G. Vegetative cell and two-celled autosporangium, strain N8. H. Four-celled autosporangium, strain KRK-12. I. Vegetative cell with a detail of an ornamented cell wall, strain N5. J. Vegetative cells, strain N5. K. Vegetative cells, strain N6. L. Four-celled autosporangium, vegetative cells and autospore, strain N6. Scale bars: 1 cm (A–B), 20 μm (C), 5 μm (D–L).