MIOCENE FLORA FROM COASTAL PLAIN 21 
Hollick, previously described from the Calvert formation of Mary- 
land. Six species are described as new. 
It seems evident that this is a localized flora and not one character- 
istic of the eastern American uplands during Miocene time, and 
we may compare the local conditions at that time with those which 
exist at the present day in the Dismal Swamp region, or, better still, 
with the innumerable cypress swamps which skirt the South Atlantic 
coast.. There is the Miocene cypress (Taxodium) by far the most 
abundant fossil in these deposits and associated with it we find 
Salvinia, a floating plant in the modern flora. The seeds of a Nyssa 
represent that modern semi-aquatic genus. Carpinus and Planera 
are both low swamp and waterside types at the present day, as are 
a majority of the willows (Salix). Platanus inhabits wet situations 
as do also several species of Fraxinus and many species of Ficus. 
The oak (Quercus) is at home in the environment pictured, while the 
Rhus, Celasirus, and the two species of Leguminoseae are not at all 
out of place in such an association. ‘The conclusion seems irresistible 
that in these fossiliferous Calvert deposits we have preserved some 
of the débris of a nearby cypress swamp, and that it was the presence 
of such swamps along the consequently low-lying coast where the 
streams were of necessity inactive, which effectually prevented any 
large amount of land-derived sediment from becoming a part of the 
Calvert formation. Citations are restricted to the more important 
references in the following notes:. 
Subkingdom Pteridophyta 
Order FILICALES 
Family Salviniaceae 
Genus Salvinia Adans 
SALVINIA FORMOSA Heer ? 
Salvinia formosa Heer, Fl. Tert. Helv., 3:156. pl. 145. f. 13-15. 1859. 
Velenovsky, Fl. Ausgebr. Tert. Letten v. Vrsovic, 12. pl. 1. f. 14-17. 1882. 
Hollick, Bull. Torrey Club, 21: 256. pl. 205. f. 6. 1894. 
Zeiller, Fl. Foss. Gites de Charbon du Tonkin, 269. pl. 51. f. 2, 3. 1903. 
This undoubted fragment of a Salvinia leaf has been doubtfully 
referred to the above species, with which it agrees in so far as its 
characters can be made out, rather than to adopt the course of found- 
ing a new species upon a single fragmentary specimen. Future 
