Fig. 1
From: New record of three economic Hypnea species (Gigartinales) in Korea
Hypnea yamadae Tanaka. a Herbarium specimen entangled at the base. b Details of vegetative branches. c Subterete to subcompressed branch with the axial cell (arrow) in the transverse section. d Spinous branchlet without basal constriction (arrow). e Ultimate branchlet with tetrasporangia. f Tetrasporangial initial (arrow) produced from the cortical cell (arrowhead). Bars in a 3 cm, b 5 mm, c 150 μm, d 80 μm, e 80 μm, f 20 μm