— 123— 



to the plants referred to as occidentale thus leaves an 

 opportunity for a new name to be applied to the Cali- 

 fornia plants. It is to be noted that Professor Under- 

 wood thinks there is still another intermediate form be- 

 tween the California plants and those farther north. 

 Knowing the variations in this genus, we are inclined to 

 think there are not one but many intermediate forms. 



INDEX TO CURRENT LITERATURE RE- 

 LATING TO FERNS. 



Readers are requested to call our attention to any 

 omissions from this list. 



Clute, W. N. A Walking Shield Fern, Illust. Fern 

 Bulletin. Jl. 1905. 



Clute, W. N. Species and Varieties Among the Ferns. 

 Fern Bulletin. Jl. 1905. 



Eaton, A. A. Botryehiuni biternatum Ufiderw. Fern 

 Bulletin, Jl. 1905. 



Eaton, A. A. The Scouring Rush Along the Missis- 

 sippi. Fern Bulletin, Jl. 1905. 



Gilbert, B. D. Otbeservations on North American 

 Pteridophytes. Fern Bulletin, Jl. 1905. 



Gilbert, B. D. Some Mexican Fernworts. Fern Bul- 

 letin, Jl. 1905. 



Klugh, A. B. Nephrodium Boottii or Xcphvodium 

 spinulosum X cristatum. Fern Bulletin, Jl. 1905. 



Maxon, W. R. A Nciv Cloak Fern From Mexico. 

 Proceedings of the Biological Society of Washington. 

 S. 2, 1905. 



Scott, W. Fern Culture. Gardening, S, 15, 1905. 

 Terry, Mrs. E. H. More About the Ferns of Dorset. 



Fern Bulletin, Jl. 1905. 

 Tidestrom, I. Notes on Botrychium Virginianum. 



Illust. Torreva, S. 1905. 

 Tidestrom, I. Notes on the Gray Polypody. Illust. 



Torreva, O. 1905. 

 Underwood, L. M. Botrychium Silaifolium. Torreva, 



Je. 1905. 



