FIGURE 10. Pegethrix bostrychoides. A. Nodule formation. B in Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species

FIGURE 10. Pegethrix bostrychoides. A. Nodule formation. B. Existence of multiple trichomes within common sheath. C–G. Variation in the degree of filament coiling, from flexuous to spiral coils. H–I. Double false-branches and single false-branches. J–K. Sheath tightly embraces trichome or expands from trichome. L. Heterogeneity in cell shape and trichome width between young and mature trichomes. Meristematic zone of cell division shown on mature trichome. Scale bar 10μm in 1000X magnification.