1. A contribution to the Latah flora of ldaho;Ashlee;Northwest Sci.,1932
2. Fossil plants of the Tertiary beaverhead basins in Southwestern Montana;Becker;Palaeontogr. Abt. B,1969
3. Genera Plantarum;Bentham,1862
4. The Lower Eocene floras of Southeastern North America. U.S;Berry;Geol. Surv. Prof. Pap.,1916
5. A Miocene Flora from the Gorge of the Yumuri River, Matanzas, Cuba;Berry,1939