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Total: 37

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Genus Sphenophyllostachys Seward Sci. Progr. (London, 1894–1900), 5(30): 436. Aug 1896

genus valid

Genus Teilhardia Seward Quart. J. Geol. Soc. London, Part I, 69(273): 96. 25 Apr 1913

genus unavailable

Genus Todites Seward Cat. Mesoz. Pl. Dept. Geol. Brit. Mus. (Nat. Hist.) ed. 1900, 3(1): 86. 16-23 Feb 1901

genus valid

Genus Torreyites Seward Foss. Pl., 4: 419. 22 Aug 1919

genus unavailable

Genus Withamia Seward Cat. Mesoz. Pl. Dept. Geol. Brit. Mus. (Nat. Hist.), [2](2): 174. Dec 1895

genus unavailable

Genus Zizyphoides Seward, V.M.Conway Meddel. Grønland, 93(5): 23. 12 Nov 1935

genus valid

Genus Zizyphoides Seward ex ?.

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