FIGURE 4 in The Ulva flexuosa complex (Ulvaceae, Chlorophyta): an updated identification key with special reference to the freshwater and hyperhaline taxa

FIGURE 4. Habitats and morphology of U. flexuosa subsp. pilifera (Voucher code: AMU-DH-U0122). A—thallus of Ulva (arrow) in the littoral zone of the Jacewo Pond (station No. 39), B—enlarged basal cells (arrows) in the apical part of the thallus, C—slightly conical and rounded apical cells (arrow) of uniseriate branches, D—cells forming a rosette (arrow) around the basal cell of branch, E—cells with 1–4 pyrenoids (arrows) in a single chromatophore, F and G—basal cells (arrows) of branches, H—rounded apical cell (arrow) of a uniseriate branch. Photo credits: A—H, A.S. Rybak.