FIGURE 2 in Morphological and molecular evidence for the recognition of Caloglossa fonticola sp. nov. (Delesseriaceae, Rhodophyta) from an underground spring in Guangxi, China

FIGURE 2. Morphological structures of Caloglossa fonticola sp. nov. A. Vegetative thalli of C. fonticola. B. Thallus blades showing hardly or slightly constricted at nodes, and lateral axis (arrows) demonstrating significantly less growth than the main axis (arrowheads). C. Cell arrangement around a node. Nodal axial cell (diamond) and first axial cell (star) of the main axis (MA) both produced one secondorder cell row (arrows) and one third-order cell rows (arrowheads) on the opposite to the lateral branch (LA), all these cell rows reach to the blade margin. D. Nodal region of thallus illustrating the nodal axial cell (diamond) produces one cell row (arrowhead) on the abaxial side not extending to the margin, and the first axial cell of the lateral axis (asterisk) produces one cell row (arrow) on the adaxial side not extending to the margin. E-G Internodal blade. Each axial cell (a) produces one second-order cell row (arrows) that forms 1-3 third-order cell rows (arrowheads). H. Rhizoids at node showing each wing cell produces a single rhizoidal filament (white arrowheads). I. Rhizoids at node displaying the type B arrangement of Kamiya et al. (2003). Rhizoidal filaments (arrowheads) arising from wing cells near the main axis and lateral axis at the nodes. Scale bars: A = 1 cm, B = 1.0 mm, C and E = 200 μm, D, F and G = 20 μm, H and I = 100 μm.