50.0 MB (4.2 MB compressed)
3413 x 5120 pixels
29.0 x 43.4 cm ⏐ 11.4 x 17.1 in (300dpi)
GUSTOIMAGES / SCIENCE PHOTO LIBRARY GUSTOIMAGES / SCIENCE PHOTO LIBRARY
Fucus guiryi, Guiry's Wrack seaweed.Similar in morphology to Fucus vesiculosus, but distinguished from it by hermaphroditic receptacles, the presence of a pronounced receptacle sterile rim, monopodial branching, and the absence of bladders; by the shorter thallus and shorter frond length between the holdfast and the first dichotomy; by a less wide apical frond; by longer and wider receptacles; by a higher ratio of receptacle width:length and receptacle height:length; by higher intertidal zonation and physiological resistance to air exposure.
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