Fig. 3
From: New record of three economic Hypnea species (Gigartinales) in Korea
Hypnea nidulans Setchell. a Herbarium specimen. b Details of vegetative branches. c Transverse section of the branch. d Lenticular thickening (arrowhead). e Branchlet with tetrasporangia (arrows). f Tetraspornagia initial (arrow) produced from the cortical cell (arrowhead). Bars in a 3 cm, b 2 cm, c 200 μm, d 50 μm, e 50 μm, and f 10 μm