13 



*tFerns, Rare Forms of. 15: 16, 43, 71, 101. 16: 12, 46, 75, 107. 17: 9, 

 45, 88, 99. 



Ferns, Species and Varieties Among the. — Willard N. Clute. 13: 65. 



Fern's Struggle for Existence in the Tropics. — Willard N. Clute. 15: 34. 



Ferns, Travelling.— Willard N. Clute. 17: 55. 



Ferns, Walking. — Adella Prescott. 19: 48. 



Fernwort, A Weedy. 12: 58. 



Ferns, Tree. — W. R. Maxon. 20: 84. 



*Fern Study, Fifteen Years of.— Willard N. Clute. 15: 97. 

 Fernwort Notes. — Willard N. Clute. 11: 12, 46. 71, 105. 

 Fernworts, Check-list of the North American. — Willard N. Clute. 



For list of Genera see Check-list of the North American Fernworts. 

 Fernworts, Check-list of the North American, Additions and Summary. 



Willard N . Clute. 16: 81. 

 Ferii'/vorjs, Check- list of the North American, More Additions to. — 



Willard N. Clute. 17: 20. 

 Fernworts Collected in Jamaica, List of. — Willard N. Clute. 11: 54. 

 *JFernworts, Rare Forms of. 18: 10, 47, 79, 106. 19: 11, 50, 72, 115. 



20: 24, 49, 74. 



Fernworts, Some Mexican. — B. D. Gilbert. 13: 79. 



Fernworts of Western New York, Remarks on Some. — Dr. E. J. Hill. 

 12: 18. 



Fertile and Sterile Fronds, Relation Between in Dimorphic Ferns. — ■ 



Geo. F. Atkinson. 19: 81. 

 Fertilization in Ferns. — Sir Ray Lankester. 19: 86. 

 Fifth Meeting of Fern Students, The. 13: 128. 

 Files, Owners of Complete. 12: 119. 



*Filmy Fern, The Round-leaved.— Willard N. Clute. 15: 14. 

 Flora of Louisiana, Additional Literature Relating to. — Mary A Day. 

 12: 54. 



Florida Crest-fern, Hardiness of. — James H. Ferriss. 15: 13. 

 Florida, Collecting in the Everglades of. — Chas. T. Simpson. 17: 38. 

 Florida East Coast, Notes on the Ferns of the. — Mrs. E. C. Anthony. 

 11: 21. 



Florida Fern, New Station for a Rare. — Willard N. Clute. 16: 38. 

 Florida, Fern Flora of. — A. H. Curtiss. 12: 33. 



Florida, Preliminary List of Pteridophyta Collected in Dade Co. — A. A. 

 Eaton. 12: 45. 



Florida Ferns, Where they Grow. — Henry H. Negley. 14: 107. 



Foreign Ferns, Current Literature Relating to. 12: 119. 



*$Forked Ebony Fern, a.— Willard N. Clute. 17: 88. 



Forking Ferns. — Aug. H. Hahne. 12: 114. 



Forms and Hybrids, Concerning. — Willard N. Clute. 12: 85. 



Forms of Botrychium simplex, The. — George E. Davenport. 14: 84. 



