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Total: 39

genus valid

Genus Acaciaephyllum Fontaine Monogr. U.S. Geol. Surv., 15(1 [Text], 2 [Atlas]): 279. Nov 1889

genus valid

Genus Aceriphyllum Fontaine Monogr. U.S. Geol. Surv., 15(1 [Text], 2 [Atlas]): 320. Nov 1889

genus unavailable

Genus Acrostichides Fontaine Monogr. U.S. Geol. Surv., 1883, 6: 24. Jul - Aug 1884

genus valid

Genus Acrostichopteris Fontaine Monogr. U.S. Geol. Surv., 15(1 [Text], 2 [Atlas]): 106. Nov 1889

genus valid

Genus Araliaephyllum Fontaine Monogr. U.S. Geol. Surv., 15(1 [Text], 2 [Atlas]): 316. Nov 1889

genus valid

Genus Aristolochiaephyllum Fontaine Monogr. U.S. Geol. Surv., 15(1 [Text], 2 [Atlas]): 322. Nov 1889

genus unavailable

Genus Aspleniopteris Fontaine Monogr. U.S. Geol. Surv., 15(1 [Text], 2 [Atlas]): 117. Nov 1889

genus valid

Genus Athrotaxopsis Fontaine Monogr. U.S. Geol. Surv., 15(1 [Text], 2 [Atlas]): 239. Nov 1889

genus valid

Genus Baieropsis Fontaine Monogr. U.S. Geol. Surv., 15(1 [Text], 2 [Atlas]): 250. Nov 1889

genus valid

Genus Cephalotaxopsis Fontaine Monogr. U.S. Geol. Surv., 15(1 [Text], 2 [Atlas]): 235. Nov 1889

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