190 Underwood: American ferns 



known West Indian herbarium of Krug and Urban, both contain 

 material not found in any other, the collections now accumulated 

 at the New York Botanical Garden exceed either, or both together 

 for that matter, in the richness and completeness of the series of 

 West Indian ferns. 



A number of the species in the following list have already 

 been reported by Mr. A. A. Eaton, whose collections in South 

 Florida were partly listed in the Fern Bulletin for April, 1904; 

 others have been reported by Mr. Maxon, by Mr. Gilbert, and 

 by the writer, in various short notes. It is thought desirable 

 to bring these together in a single list which will supplement 

 the last (1900) edition of Our Native Ferns and their Allies. It 

 will be noted that the list contains six genera and forty-nine 

 species from the limits of the United States, not included in 

 that work ; two of these, however, displace species already re- 

 ported under other names, so that the net increase is forty-seven 

 species. Besides these a considerable number of varieties have 

 been described ; some of these are based on mere sports like the 

 var. Hortonae of Asplenium platy neuron y and Pellaea atropurptirca 

 cristata, while others may represent something more permanent 

 in character. No attempt has been made to list these here. 

 Among the forty-seven species, two are plants introduced from 

 cultivation, which have apparently become locally established. 

 One species of Equisetum and four species of Selaginella must be 

 placed in the list of "Species inquirendae /' inasmuch as they are 

 imperfectly known. Removing these two doubtful series from the 

 list there are still forty native species which represent bona fide 

 additions to our known flora. The list follows, arranged in syste- 

 matic order : 



OPHIOGLOSSACEAE 



Botrvchium alabamense Maxon, Proc. Biol. Soc. Washington 

 19: 23. 1906. (Type from Mobile, Alabama, Dukes.) 



Botrvchium californicum Underw. Torreya 5 : 107. 1905. 



This species is the Californian plant hitherto mistaken for B. 

 silai folium Presl. B. Occident ale Underw. becomes a synonym of 

 the latter species, having been based on a tall-growing form. 



