PLATE VI. 



Page. 



Fig. 1. Root, or rhizoma, and rootlets of Lygodium neuropteroidks Gl 



Figs. 2-4. Equisetum Haydenii, Gr. 3, 4 a C7 



Fig. 5. Equisetum limosum ? Gr. 4 6 ? 69 



Figs. 6,7. Equisetum l^vigatum, Gr. 1 68 



Figs. 8-11. Equisetum Wyomingense, Gr. 4 a 69 



9 a. Fragment of stem, magnified. 



Figs. 12-14. Taxodiu.m distichum miocenicum, Gr. 3, 4 6 73 



14 a. Branch magnified. 



