FIGURE 4 in Distinctive morphological characteristics of Fucus guiryi (Fucales, Phaeophyceae) from Canary Islands, subtropical eastern Atlantic Ocean

FIGURE 4. Sections of branches of Fucus guiryi. A. Transverse section of branch at the level of the second dichotomy. Scale bar = 200 µm. B, C. Cortex and medulla in the marginal area. D. Zone between the margin and the central nerve. E, F. Medulla and cortex of central area, respectively. Scale bar = 20 µm. Arrowhead shows abundant mucilage. Stained as above. Photos by M.A. Ruiz-Medina.