• Laurencia J.V.Lamouroux, 1813
• Laurencia affinis Sonder, 1845 accepted as Laurencia filiformis (C.Agardh) Montagne, 1845
• Laurencia aguilar-rosasorum J.N.Norris, 2014
• Laurencia aldingensis Saito & Womersley, 1974
• Laurencia alfredensis Francis, Bolton, Mattio & R.J.Anderson, 2017
• Laurencia alsidiiformis Zanardini ex Fraudenfeld, 1855 (uncertain)
• Laurencia alsidioides P.L.Crouan & H.M.Crouan, 1865 (uncertain > taxon inquirendum)
• Laurencia amabilis Yamada, 1953 accepted as Palisada amabilis (Yamada) K.W.Nam, 2011
• Laurencia arbuscula Sonder, 1845
• Laurencia articulata C.K.Tseng, 1943 accepted as Chondrophycus articulatus (C.K.Tseng) K.W.Nam, 1999
• Laurencia australis M.Preuss, Diaz-Tapia, Verbruggen & Zuccarello, 2023
• Laurencia baileyana Montagne, 1848 accepted as Chondria baileyana (Montagne) Harvey, 1853
• Laurencia batracopus (Bory de Saint-Vincent) Greville, 1830
• Laurencia blinksii Hollenberg & I.A.Abbott, 1965 accepted as Osmundea blinksii (Hollenberg & I.A.Abbott) K.W.Nam, 1994
• Laurencia bolivarii N.Rodríguez Rios, 1981 accepted as Osmundea oederi (Gunnerus) G.Furnari, 2008
• Laurencia boryana De Notaris ex J.Agardh, 1842 accepted as Alsidium corallinum C.Agardh, 1827
• Laurencia boryi De Notaris, 1842 accepted as Alsidium corallinum C.Agardh, 1827
• Laurencia botrychioides Harvey, 1855
• Laurencia botryocarpa Shperk, 1869
• Laurencia botryocephala Kützing, 1849 (uncertain)
• Laurencia botryoides (C.Agardh) Gaillon, 1828
• Laurencia botryoides var. minor Harvey, 1863 accepted as Laurencia arbuscula Sonder, 1845
• Laurencia brachyclados Pilger, 1920
• Laurencia brandenii Saito & Womersley, 1974 accepted as Chondrophycus brandenii (Y.Saito & H.B.S.Womersley) K.W.Nam, 1999
• Laurencia brasiliana Martens, 1871
• Laurencia brongniartii J.Agardh, 1841
• Laurencia caduciramulosa Masuda & Kawaguchi, 1997
• Laurencia caerulescens P.L.Crouan & H.M.Crouan, 1852 accepted as Chondria coerulescens (J.Agardh) Sauvageau, 1897
• Laurencia caespitosa J.V.Lamouroux, 1813 accepted as Osmundea hybrida (A.P.de Candolle) K.W.Nam, 1994
• Laurencia caespitosa var. subsimplex Montagne accepted as Osmundea hybrida (A.P.de Candolle) K.W.Nam, 1994
• Laurencia californica (Kützing) Kützing, 1865
• Laurencia calliclada Masuda, 1997
• Laurencia calliptera Kützing, 1865
• Laurencia canaliculata J.Agardh
• Laurencia canariensis Montagne ex Kützing, 1849 (uncertain)
• Laurencia canariensis f. major P.Crouan & H.Crouan, 1878 (uncertain)
• Laurencia capensis Harvey, 1849 accepted as Chondria capensis (Harvey) Askenasy, 1888
• Laurencia capituliformis Yamada, 1931 accepted as Palisada capituliformis (Yamada) K.W.Nam, 2007
• Laurencia caraibica P.C.Silva, 1972
• Laurencia carolinensis Y.Saito, 1969 accepted as Chondrophycus carolinensis (Y.Saito) K.W.Nam, 1999
• Laurencia cartilaginea Yamada, 1931 accepted as Chondrophycus cartilagineus (Yamada) Garbary & J.T.Harper, 1998
• Laurencia caspica A.D.Zinova & Zaberzhinskaya, 1968 accepted as Osmundea caspica (Zinova & Zaberzhinskaya) Maggs & L.M.McIvor, 2017
• Laurencia casuarina J.Agardh, 1896 accepted as Husseya rubra (Harvey) P.C.Silva, 1996
• Laurencia catarinensis Cordeiro-Marino & Fujii, 1985
• Laurencia cervicornis Harvey, 1853 accepted as Palisada cervicornis (Harvey) Collado-Vides, Cassano & M.T.Fujii, 2017
• Laurencia ceylanica J.Agardh, 1876 accepted as Chondrophycus ceylanicus (J.Agardh) M.J.Wynne, Serio, Cormaci & G.Furnari, 2005
• Laurencia chauvinii Bory de Saint-Vincent
• Laurencia chilensis De Toni, Forte & M.A.Howe, 1920
• Laurencia chinensis C.K.Tseng, 1943
• Laurencia chondrioides Børgesen, 1918
• Laurencia chondryopsides P.L.Crouan & H.M.Crouan, 1878 accepted as Chondria sedifolia Harvey, 1853
• Laurencia cladonioides Kützing
• Laurencia clarionensis Setchell & N.L.Gardner, 1937
• Laurencia clavata Sonder, 1853 accepted as Corynecladia clavata (Sonder) J.Agardh, 1876
• Laurencia clavifera Suhr, 1840 (uncertain)
• Laurencia claviformis Børgesen, 1924
• Laurencia coelenterata D.L.Ballantine & Aponte, 1995 accepted as Osmundea coelenterata (D.L.Ballantine & Aponte) M.T.Fujii, Sentíes & Areces, 2016
• Laurencia columellaris Børgesen, 1945 accepted as Chondrophycus columellaris (Børgesen) E.Coppejans & A.J.K.Millar, 2000
• Laurencia complanata (Suhr) Kützing, 1849
• Laurencia composita Yamada, 1931
• Laurencia concinna Montagne, 1842 accepted as Laurencia brongniartii J.Agardh, 1841
• Laurencia concinna var. tetragona Grunow (uncertain)
• Laurencia concreta A.B.Cribb, 1983 accepted as Chondrophycus concretus (A.B.Cribb) K.W.Nam, 1999 accepted as Palisada concreta (A.B.Cribb) K.W.Nam, 2007
• Laurencia condaoensis P.H.Hô (uncertain)
• Laurencia congesta W.R.Taylor, 1945
• Laurencia corallopsis (Montagne) M.A.Howe, 1918 accepted as Palisada corallopsis (Montagne) Sentíes, Fujii & Díaz-Larrea, 2008
• Laurencia coronopus J.Agardh, 1852
• Laurencia corymbifera Kützing
• Laurencia corymbosa J.Agardh, 1852
• Laurencia crassifrons P.L.Crouan & H.M.Crouan
• Laurencia crispa Hollenberg, 1943 accepted as Osmundea crispa (Hollenberg) K.W.Nam, 1984
• Laurencia cruciata Harvey, 1855 accepted as Palisada cruciata (Harvey) K.W.Nam, 2007
• Laurencia crustiformans K.J.McDermid, 1989 accepted as Palisada crustiformans (K.J.McDermid) A.R.Sherwood, A.Kurihara & K.W.Nam, 2017
• Laurencia cryptoclada Kützing, 1866
• Laurencia cyanosperma (Delile) Gaillon, 1828
• Laurencia cyanosperma Delile ex J.V.Lamouroux, 1813
• Laurencia cylindrica (Kützing) Kützing
• Laurencia cymosa Kützing, 1865
• Laurencia cymosa var. major Kützing (uncertain)
• Laurencia dasyphylla (Woodward) Greville, 1830 accepted as Chondria dasyphylla (Woodward) C.Agardh, 1817
• Laurencia dasyphylla var. squarrosa Harvey (uncertain)
• Laurencia decidua E.Y.Dawson, 1954
• Laurencia decumbens Kützing, 1863
• Laurencia dendroidea J.Agardh, 1852
• Laurencia densissima Setchell & N.L.Gardner, 1937
• Laurencia depauperata Zanardini (uncertain)
• Laurencia dichotoma Francis, Bolton, Mattio & R.J.Anderson, 2017
• Laurencia diegoensis E.Y.Dawson accepted as Osmundea spectabilis var. diegoensis (E.Y.Dawson) K.W.Nam
• Laurencia digitatum Francis, Bolton, Mattio & R.J.Anderson, 2017
• Laurencia dinhii Masuda & Kogame, 1998 accepted as Palisada dinhii (Masuda & Kogame) K.H.Nam, 2007
• Laurencia distichophylla J.Agardh, 1852
• Laurencia divaricata J.Agardh, 1852 accepted as Laurencia obtusa var. divaricata Yamada, 1931
• Laurencia divaricata Suhr, 1840 accepted as Caulacanthus ustulatus (Turner) Kützing, 1843
• Laurencia dotyi Saito, 1969 accepted as Chondrophycus dotyi (Y.Saito) K.W.Nam, 1999
• Laurencia elata (C.Agardh) J.D.Hooker & Harvey, 1847 accepted as Corynecladia elata (C.Agardh) Cassano, M.C.Oliveira & M. T.Fujii, 2019
• Laurencia elata f. luxurians (Harvey) Yamada, 1931 accepted as Laurencia elata (C.Agardh) J.D.Hooker & Harvey, 1847 accepted as Corynecladia elata (C.Agardh) Cassano, M.C.Oliveira & M. T.Fujii, 2019
• Laurencia elata var. californica Kützing, 1849 accepted as Laurencia californica (Kützing) Kützing, 1865
• Laurencia elata var. luxurians Harvey, 1863 accepted as Coronaphycus elatus (C.Agardh) Metti, 2015 accepted as Corynecladia elata (C.Agardh) Cassano, M.C.Oliveira & M. T.Fujii, 2019
• Laurencia elegans A.H.S.Lucas, 1935
• Laurencia epiphylla F.Boisset & J.C.Lino, 1998