SPECIES _u_
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ulva
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Phycoseris ulva
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ulvoidea
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Aeodes ulvoidea;
*Aeodes ulvoidea;
*Gelinaria ulvoidea;
Halymenia ulvoidea
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umbellata
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Corynecladia umbellata;
Galaxaura umbellata;
Leathesia umbellata;
Tubularia umbellata
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umbellula
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Chondria umbellula;
*Coeloclonium umbellula
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umbilicalis
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Porphyra umbilicalis;
*Porphyra umbilicalis;
Porphyra umbilicalis forma purpurea;
Ulva umbilicalis
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umbilicata
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Conferva umbilicata;
Conferva umbilicata
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umbilicatum
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*Microdictyon umbilicatum;
Microdictyon umbilicatum
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uncialis
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Phycoseris uncialis;
*Ulva uncialis
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uncinata
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*Lomentaria uncinata var. filiformis
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uncinatum
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Acrosorium uncinatum;
Nitophyllum uncinatum;
Nitophyllum uncinatum
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uncinella
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*Cladophora uncinella
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undulata
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Cryptonemia undulata;
*Cryptonemia undulata;
*Laurencia undulata;
Platymenia undulata var. obovata
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undulatum
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Monostroma undulatum;
Monostroma undulatum;
Protomonostroma undulatum;
*Protomonostroma undulatum forma pulchrum;
Sargassum undulatum
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undulatus
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Fucus undulatus
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unguiformis
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*Polysiphonia unguiformis
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ungulata
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*Amphiroa ungulata;
Corallina ungulata;
Corallina ungulata forma brevior;
*Jania ungulata;
*Jania ungulata forma brevior
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unipes
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*Acrochaetium unipes;
Kylinia unipes
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upolensis
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*Polysiphonia upolensis
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urbana
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*Polysiphonia urbana
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urceolata
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Dasya urceolata;
*Haplodasya urceolata;
Polysiphonia urceolata;
Polysiphonia urceolata;
*Polysiphonia urceolata forma lepadicola
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urvilleana
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*Caulerpa urvilleana;
Caulerpa urvilleana;
*Caulerpa urvilleana forma tristicha
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urvillei
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*Gracilaria urvillei;
Hydropuntia urvillei;
Polycavernosa urvillei
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usmanghanii
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*Gelidium usmanghanii;
Gelidium usmanghanii;
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usnea
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Fucus usnea;
Fucus usnea;
*Hymenocladia usnea
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usneoides
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*Cystoseira usneoides;
Fucus usneoides
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ustulatus
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*Caulacanthus ustulatus;
Caulacanthus ustulatus
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utricularis
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*Adenocystis utricularis;
Asperococcus utricularis;
Conferva utricularis;
*Polysiphonia utricularis;
*Valonia utricularis;
Valonia utricularis;
*Valonia utricularis forma crustacea
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utriculosa
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Cladophora utriculosa;
Cladophora utriculosa
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uvaria
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Botryocladia uvaria;
Chrysymenia uvaria;
Chrysymenia uvaria;
Chrysymenia uvaria forma luxurians;
Chrysymenia uvaria var. leptopoda
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uvifer
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Fucus uvifer
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uvifera
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Blossevillea uvifera;
Caulerpa uvifera;
Caulerpa uvifera forma compressa;
*Caulerpa uvifera forma intermedia;
*Caulerpa uvifera forma planiuscula;
*Caulocystis uvifera;
Cystophora uvifera;
Laurencia uvifera
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uviferum
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Sargassum uviferum