dc:description"FIG. 1. – Apical parts of Nitella sonderi A.Braun from Argentina with sterile and fertile whorls (LE). Note: arrowhead, sterile whorls; double arrowhead, fertile whorls of male plants. Photo taken by R. E. Romanov. Scale bar: 1 cm.";
dc:description"FIG. 2. – Male plants of Nitella sonderi A.Braun from Argentina (LE): A, whorl of sterile branchlets; B, sterile branchlet; C, apex with whorls of fertile branchlets forming lax head; D, lax apical head consisting of fertile branchlets, embedded in mucilage 3-furcate “prolification” looking as a fertile branchlet without a central secondary ray from the lateral tertiary ray at the furcation of the central secondary ray (double arrowhead); E, last furcations of fertile branchlets with long straight dactyls; F, fertile branchlet with antheridia obviously unequal each other; G, mucilage cover of fertile branchlet (double arrowhead), mucilage cover of branchlet primary ray; H, antheridia at last furcations of branchlet surrounded with short dactyls, arcuate at their basal parts. Note: A-C, arrowheads represent central secondary ray; D, F, G, arrowheads represent surface of mucilage cover. Photos taken by R. Vidal-Russell. Scale bars: A, E, F, 2 mm; B-D, 5 mm; G, H, 1 mm.";
dc:description"FIG. 3. – Male plants of Nitella sonderi A.Braun from Argentina (LE): A, B, cells extending from the node at the base of the lowest branchlet cell at different focus (arrowheads at A); C-E, shortly narrowing ends of bicellulate dactyls with discoloured tiny confluent end cells having thickened cell walls at the tip; F, end of dactyl after loss of end cell; G, H, triangular shields of antheridia. All photos taken by R. E. Romanov, but H by R. Vidal-Russell. Scale bars: 100 μm.";
