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                                    Platythamnion heteromorphum (J.Agardh) J.Agardh
                                 | 
                                J. Macoun 75 | 
                                May 1914 | 
                                Canada | 
                                British Columbia | 
                                Mayne Island | 
                                — | 
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                                    Platythamnion heteromorphum (J.Agardh) J.Agardh
                                 | 
                                J. Macoun s.n. | 
                                13 Aug 1908 | 
                                Canada | 
                                British Columbia | 
                                Greater Vancouver Reg. Distr. Vancouver… | 
                                — | 
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                                | 
                                    Platythamnion heteromorphum (J.Agardh) J.Agardh
                                 | 
                                M. A. Howe s.n. | 
                                1892 | 
                                United States of America | 
                                California | 
                                Monterey Co. Pacific Grove | 
                                — | 
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                                    Platythamnion heteromorphum (J.Agardh) J.Agardh
                                 | 
                                H. Hemphill s.n. | 
                                — | 
                                United States of America | 
                                California | 
                                Golden Gate | 
                                — | 
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                                    Platythamnion heteromorphum (J.Agardh) J.Agardh
                                 | 
                                G. A. Hall s.n. | 
                                s.d. | 
                                United States of America | 
                                California | 
                                Santa Cruz Co. Santa Cruz | 
                                — | 
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                                    Platythamnion heteromorphum (J.Agardh) J.Agardh
                                 | 
                                G. W. Lichtenthaler s.n. | 
                                s.d. | 
                                United States of America | 
                                California | 
                                Lobos Point | 
                                — | 
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                                    Platythamnion heteromorphum (J.Agardh) J.Agardh
                                 | 
                                J. M. Weeks | W. A. Setchell s.n. | 
                                02 Jan 1897 | 
                                United States of America | 
                                California | 
                                Monterey Co. on the underside… | 
                                — | 
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                                | 
                                    Platythamnion heteromorphum (J.Agardh) J.Agardh
                                 | 
                                J. M. Weeks | W. A. Setchell s.n. | 
                                02 Jan 1897 | 
                                United States of America | 
                                California | 
                                Monterey Co. on the underside… | 
                                — | 
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                                | 
                                    Platythamnion heteromorphum (J.Agardh) J.Agardh
                                 | 
                                J. M. Weeks | W. A. Setchell s.n. | 
                                02 Jan 1897 | 
                                United States of America | 
                                California | 
                                Monterey Co. on the underside… | 
                                — | 
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                                | 
                                    Platythamnion heteromorphum (J.Agardh) J.Agardh
                                 | 
                                S. M. Zeller | E. B. Zeller 1294 | 
                                25 Jun 1917 - 01 Aug 1917 | 
                                United States of America | 
                                Washington | 
                                San Juan Island. | 
                                — | 
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                                | 
                                    Platythamnion heteromorphum (J.Agardh) J.Agardh
                                 | 
                                S. M. Zeller | E. B. Zeller 1294 | 
                                25 Jun 1917 - 01 Aug 1917 | 
                                United States of America | 
                                Washington | 
                                San Juan Island. | 
                                — | 
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                                    Platythamnion heteromorphum (J.Agardh) J.Agardh
                                 | 
                                Collector unknown s.n. | 
                                13 Aug 1908 | 
                                Unknown | 
                                — | 
                                Dredged in Departure Bay | 
                                — | 
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                                    Platythamnion heteromorphum (J.Agardh) J.Agardh
                                 | 
                                Collector unknown 189 | 
                                26 Jul 1909 | 
                                — | 
                                — | 
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                                — | 
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                                    Platythamnion heteromorphum (J.Agardh) J.Agardh
                                 | 
                                Collector unknown 116 | 
                                1908 | 
                                — | 
                                — | 
                                Departure Bay | 
                                — | 
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