18 



Ontario, The Fern-flora of. — A. B. Klugh. 14: 65. 

 Ontario, Ophioglossum vulgare in. — F. J. Morris. 17: 102. 

 - Ophioglossum Californicum in Central California. — S. B. Parish. 13: 49. 

 Ophioglossum, The Effect of Habitat upon.— Willard N. Clute. 19: 71. 

 Ophioglossum vulgatum in Nebraska. — James M. Bates. 20: 67. 

 Ophioglossum vulgatum in Ontario. — F. J. A. Morris. 17: 102. 

 Osmunda, Fall Fruiting of.— W. C. Dukes. 12: 103. 

 Osmunda cinnamomea, f. angusta. — D. Lewis Dutton. 17: 89. 

 Osmunda cinnamomea f. incisa. 13: 103. 

 *$Osmundas, Four Aberrant.— Willard N. Clute. 17: 9. 

 Osmundas, The. — Adella Prescott. 20: 21. 



tOstrich Fern, A New Variety of. — William A. Terry. 16: 3. 

 Ostrich Fern, var. pubescens. — A. A. Eaton. 16: 47. 

 Owners of Complete Files. 12: 119. 

 Owners of Complete Sets. 20: 89. 



P 



*fPedate Bracken, A.— Willard N. Clute. 16: 33. 

 Pellaea aspera. 12: 43. 



Pellaea ornithopus. — A. A. Eaton. 12: 113. 



Pennsylvania, Adiantum capillus-veneris in. — Willard N. Clute. 12: 121. 



Pennsylvania, Asplenium ebenoides in Chester Valley, Pa. — T. Chalkley 



Palmer. 14: 111. 

 Pennsylvania, Fern Flora of. — W. A. Poyser. 17: 65. 

 Pennsylvania, Notes on the Distribution of Certain Plants in Western. 



—Otto E. Jennings. 18: 99. 

 Peters, Thomas Minot, Death of. 17: 111. 

 *Philippine Pedate Bracken.— Willard N. Clute. 18: 43. 

 Pilosiuscula, Meaning of.— C. E. Waters. 18: 128. 



Pinnatifid Spleenwort in Northern Ohio, The. — Ernest W. Vickers. 18: 4. 

 *$Polypodies, Two new from Arizona. — Willard N. Clute. 18: 97. 

 *fPolypodium or Xiphiopteris. — Willard N. Clute. 20: 65. 

 Polypodium falcatum, The Status of. 12: 101. 

 *fPolypodium piloselloides. — Willard N. Clute. 14: 59. 

 *tPolypodium, Some Variations in. — Willard N. Clute. 18: 47. 

 *fPolypodium, The Grass-like.— Willard N. Clute. 16: 99. 

 JPolypodium vulgare var. Alato-multifidum. — B. D. Gilbert. 14: 105. 

 JPolypodium vulgare and its Varieties in America. — B. D. Gilbert. 14: 

 33. 



Polypodium vulgare auritum. — H. W. Jewell. 16: 85. 



Polystichum acrostichoides and Some Insects that Infest it. — Augusta 



Schenck Kalbfleisch . 12: 48. 

 Polystichum acrostichoides x angulare. — Amedee Hans. 16: 14. 



