Nephrolepis, The Tubers of, 15: 

 84. 



New Station for Mountain Spleen- 

 wort, 17: 112. 



Nomenclature, Absurdity in, 15: 57. 



Nomenclature, Some Curious, 16: 

 119. 



Ohio, Ferns of, 16: 121. 

 Onoclea sensibilis in the South, 15: 

 50. 



Onoclea sensibilis obtusilobata, 17: 

 19. 



Onoclea sensibilis, The Forms of, 

 15: 85. 



Ophioglossum, Development of, 

 16: 24. 



Ophioglossum, The Fertile Spike 



of, 17: 114. 

 Osmunda, An Aberrant, 18: 53. 

 Osmunda cinnamomea f. frondosa, 



17: 18. 



Osmunda cinnamomea incisa, 17: 

 19. 



Osmunda, Fall Fruiting of, 16: 121. 

 Osmunda, Variant, 17: 112. 

 Ostrich Fern, Sex in, 19: 53. 

 Packing Fresh Fronds, 15: 52. 

 Panama Club Mosses, New, 20: 26. 

 Panama Fern, A Curious, 19: 89. 

 Pellaea, Apogamy in, 20: 57. 

 Pellaea atropurpurea var. Bushii, 

 18: 15. 



Pellaea gracilis on Sandstone, 19: 

 84. 



Permian Ferns, 17: 117. 

 Pollination and Fertilization, 17: 

 119. 



Polynomial Ferns, 15: 84. 

 Polypodium aureum Mandianum, 

 17: 24. 



Polypodium vulgare auritum, 15: 

 86. 



Polypodium vulgare f. bifido — 

 cristatum, 18: 15. 



Polypody, A New Form of, 16: 91. 

 Polypody, Sporting of, 19: 85. 

 Polypody, The Virtues of, 19: 18. 

 Polystichum acrostichoides recur- 



vatum, 16: 15. 

 Polystichum acrostichum multi- 



fidum, 18: 55. 

 Pteris serrulata, Range of, 15: 87. 

 Red-stiped Lady Fern, 17: 113. 

 Resurection Fern, Reproduction of, 



15: 25. 



Schizaea, Distribution of, 19: 88. 

 Schizaea pusilla in Newfoundland, 

 17: 112. 



Sex in the Ostrich Fern, 19: 53. 

 Shelter Island Ferns, 17: 114. 

 Spleenwort, Black, in America, 19: 

 121. 



Spleenwort, Mountain, New Sta- 

 tion for, 17: 112. 



Spores, Color of Fern, 17: 22. 



Spore-bearing in Crest Fern, 17: 

 23. 



Sporophyll Zones, 20: 59. 



Spores, Light and Germination of, 



16: 24. 

 Stipe or Stipes, 20: 57. 

 Stolons of Nephrolepis, The, 18: 



54. 



Taenitis, Affinities of, 20: 59. 

 Tree Ferns, 17: 116. 

 Trinomial Fern Names, 19: 84. 

 Tubers of Nephrolepis, The, 15: 

 84. 



Variant Osmunda, 17: 112. 

 Wariant Osmunda, 17: 112. 

 Walking Fern, The Eared, 15: 86. 

 Water CJover. The, 15: 44. 

 Water, The Boulder Fern and, 15: 

 57. 



Wood Ferns Grouped Anew, 19: 

 16. 



Wnodsia Oregana. 16: 106. 

 Woodwardia on Cape Cod, 20: 28. 



