Tapeinodasya Weber-van Bosse (Ceramiales, Rhodophyta)

O. De Clerck, Y.S.D.M. de Jong, and E. Coppejans

Figs 11-16. Vegetative and reproductive morphology of T. bornetii.

Fig. 11. Detail of an apical part of the thallus. Scale = 1 mm.

Fig. 12. Detail of a vegetative apex showing cellulosympodial growth and an alternating-clockwise sequence of periaxial cell formation. Scale = 10 Ám

Fig. 13. Schematic representation of the branching pattern of a bilaterally organised sympodial main axis with apparently radially organised adventitious sympodial axes developing endogenously in the axils of the pseudolaterals. Scale = 250 Ám.

Fig. 14. Transverse section of an older portion of an axis showing the axial cell surrounded by 4 periaxial cells and extensive cortical layers. Scale = 100 Ám.

Fig. 15. Apex of a tetrasporangial stichidium showing the formation of a cover cell prior to the formation of a tetrasporangium from the second and third periaxial cell (first and fourth periaxial cells and derivatives are not illustrated). Scale = 25 Ám.

Fig. 16. Cross section through a mature part of a tetrasporangial stichidium. Scale = 50 Ám.
Abbreviations: ap : apex; pl : pseudolateral.