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Total: 14

genus unavailable

Genus Casea Newb. Ann. Sci. (Cleveland), 1(9): 106. 15 Feb 1853

genus valid

Genus Cornophyllum Newb. Monogr. U.S. Geol. Surv., 1895, 26: 119. Nov 1896

genus unavailable

Genus Fontainea Newb. Monogr. U.S. Geol. Surv., 1895, 26: 94. Nov 1896

genus valid

Genus Liriodendropsis Newb. Monogr. U.S. Geol. Surv., 1895, 26: 82. Nov 1896

genus valid

Genus Palaeanthus Newb. Bull. Torrey Bot. Club, 13(3): 37. Mar 1886

genus unavailable

Genus Plataeanthus Newb. in Knowlt. Bull. U.S. Geol. Surv., (152): 168. Oct 1898

genus unavailable

Genus Polysporia Newb. Ann. Sci. (Cleveland), 1(9): 108. 15 Feb 1853

genus valid

Genus Rhamnites Newb. Ann. Lyceum Nat. Hist. New York, 9(Art. 1): 50. Apr 1868

genus valid

Genus Spiraxis Newb.

genus valid

Genus Tiliaephyllum Newb. Monogr. U.S. Geol. Surv., 1895, 26: 109. Nov 1896

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