FIG. 7 in Molecular assessment of the tribes Streblocladieae and Polysiphonieae (Rhodomelaceae, Rhodophyta) in the British Isles reveals new records and species that require taxonomic revision

FIG. 7. — Polysiphonia delicata Díaz-Tapia: A, habit; B, cross-section of an axis with four pericentral cells; C, rhizoid in open connection with a pericentral cell; D, cystocarp. Scale bars: A, 10 mm; B, 20 µm; C, 200 µm; D, 50 µm.