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''Drawing legend'': ''Sargassum paniculatum'' - 1, habit of portion of a fertile branch with young receptacles, leaves and vesicles; 2, detail of a portion of a fertile branch with female receptacles; 3, detail of a portion of a fertile branch with male receptacles; 4, details of vesicles; 5, leaves from different branch orders. ''S. alternato-pinnatum'' - 6, detail of a section of an androgynous receptacle with both a male and a female conceptacle.