PAGE 



Nephrodium Boottii or Nephrodium spinulosum x 



cristatum 86 



North American Fernworts, A Check-list of — Wil- 

 lard N. Clute 109 



North American Pteridophytes, Observations on 



—B. D. Gilbert 74, 100 



Notes 30, 88, 121 



Ophioglossum Californicum in Central California 



—S: B. Parish 40 



Osmnnda Cinnamomea f. incisa 103 



Polypodinm vulgare cristatum 75. 



Reversions and their Fluctuations — G. E. Daven- 

 port 106 



Round-leaved Maidenhair — Willard X. Clute 49 



Schizaea pusilla in Cape Breton — Geo. E. Nichols 97 

 Scolopendrium vulgare in Ontario — A. B. Klugh. .104 



Scouring Rush Along the Mississippi, The 85 



Selaginella Caribensis 74 



Shield Fern, A walking— Willard N. Clute 78 



South-west Georgia, How and Where Ferns Grow 



in— Mrs, A. P.. Taylor 53 



Species and Varieties Among the Ferns — Willard 

 N. Clute ' 65 



