INDEX TO RECENT LITERATURE. 



Readers are requested to call our attention to any 

 errors in, or omissions from, this list. 



Benedict, R. C. Studies in the Ophioglossaceae. — /. 

 Torreya, Ap., 1908. — Notes on terminology and 

 a key to the American species of Ophioglossum. 



Clute, W. N. A check-list of the North- American 

 Fern-worts. Fern Bulletin Ja. 1908. — A continua- 

 tion embodying the Salviniaceae, Marsiliaceae. 

 Equisetaceae and Lycopodiaceae. 



Clute, W. N. A New Fern . Illust. American 

 Botanist F. 1908. 



Clute, W. N. A Nezv Fern from the United States. 

 Illust. Fern Bulletin, Ja. 1908. — Description of As- 

 plenium Ferrissi. 



Clute, W. N. But Half a Fern. Illust. Fern Bul- 

 letin, Ja. 1908. — An account of the structure and 

 functions of the gametophyte. 



Clute, W. N. Generic Relationships. Fern Bulletin, 

 Ja. 1908. 



Clute, W. N. Rare Forms of Ferns. — VI. Illust. 

 Fern Bulletin, Ja. 1908. — Description of Nephrod- 

 ium cristatum clintonianum sihaticnm. 



Clute, W. N. The Genus Acrostichum. Illust. 

 American Botanist Ja. 1908. 



Eaton, A. A. Normcnclatorial Changes in Isoctcs. 

 Rhodora, Mr. 1908. — Isoetes Macrospora hetros- 

 pora and /. Dodgei Robinsii made as new combina- 

 tions. 



Foster, A. S. Poly podium Scoulcri. Muhlenbergia, 

 Ap. 1908. — Several stations for this fern in Wash- 

 ington and Oregon reported. 



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