Fig. 2
From: New record of three economic Hypnea species (Gigartinales) in Korea
Hypnea cenomyce J. Agardh. a Herbarium specimen. b Details of the tetrasporangial branches. c Lenticular thickenings (arrowheads) in the medullary cell walls. d Transverse section of the branch with axial cell (arrowhead). e Tetrasporangial branchlet. f Tetrasporangial initial (arrow) produced from the cortical cell (arrowhead). Bars in a 3 cm, b 5 mm, c 200 μm, d 200 μm, e 50 μm, and f 15 μm