FIGURE 4 in Revision of herbarium specimens of freshwater Enteromorpha-like Ulva (Ulvaceae, Chlorophyta) collected from Central Europe during the years 1849-1959

FIGURE 4. Ulva cf. flexuosa (Voucher code: ZH0004). A—Thallus from herbarium sheet, B and C—strong mineral incrustation on the thallic surface, D—irregular arrangement of cells with wide walls, E—Lugol's iodine stained organelles in area of chromatophore, F—increased initial cell of monoserrate proliferation.