502 



INDEX. 



Oak, the Live, 98. 



Oak, the Wads worth, 97. 



Oak-tree, the, near Saintes, 96. 



Oak-trees, remarkable, 94. 



Olive-tree of Pescio, 98. 



Onoclea sensibilis, genealogy of, 162. 



Origin of Sequoias discussed, 144. 



Origin of species discussed, 134, 172, 



225. 

 Origin of the prairies discussed, 214. 

 Orotava, Dragon-tree of, 123. 



Pampas, absence of trees from the, dis- 

 cussed, 263. 



Pertinacity and predominance of 

 weeds, 234. 



Pescio, Olive-tree of, 99. 



Phlox Carolina, 50. 



Pickering, Charles, sketch of, 406. 



Pilgrimage to Torreya, 189. 



Pine, the White, 107. 



Pine-Barrens of New Jersey, flora of, 

 275. 



Pinus Lambertiana, 108. 



Plains, flora of the great, 277. 



Plane-tree, large specimens of the, 91. 



Plantago cucullata, 247. 



Plants common to eastern America 

 and eastern Asia, 269. 



Plants common to eastern Asia and 

 North America (Table), 165. 



Plants common to east Asia and Pa- 

 cific North America (Table), 170. 



Plants common to Europe and North 

 America, 171. 



Plants, European, naturalized in eastern 

 America (Table), 239. 



Plants of America absent from Europe, 

 268. 



Plants selected by climatic influence, 

 223. 



Podophyllum, 154. 



Polygonella parvifolia, 25. 



Populus tremuloides, 220. 



Prairies, origin of, discussed, 214. 



Predominance and pertinacity of 

 weeds, 234. 



Puebela, the Cypress of, 113. 



Pursh, the flora of, 245 ; sketch of, 

 245 ; travels in North America, 32. 



Pycnanthemum, remarks on, 67. 

 Pyrularia oleifera, 44. 



Baia Batis, Wyman's investigation of 



the development of, 391. 

 Bana pipiens, Wyman's paper on, 389. 

 Bhododendron Catawbie?ise, discovery 



of, 31. 

 Bhus toxicodendron, 154. 

 Rhus venenata, 154. 

 Roan Mountain, plants on the summit 



of, 64. 

 Rocky Mountains, flora of, 277. 

 Roeper, Johannes August Christian, 



sketch of, 482. 

 Rumford, sketch of, by De Candolle, 



297. 



Santa Maria del Tule, the Cypress of, 

 114. 



Sartwell, Henry P., sketch of, 343. 



Saxifraga Careyana, 55. 



Scutellaria Guilielrni, 168. 



Scutellaria serrata, 40. 



Sedum pusillum, habitat of, 29. 



Sequoia and its history, 142. 



Sequoia, fossil, 159. 



Sequoia Longsdorfii, 159. 



Sequoia Sternberpii, 159. 



Sequoias, origin of, discussed, 144. 



Short, Charles Wilkins, sketch of, 312. 



Shortia galacifolia, 69. 



Sierra Nevada forests, 212. 



Smith's, Sir James E., herbarium, 9; 

 purchase of Linnaeus' herbarium, 2. 



Soci^te* d'Arcueil, 302. 



Solidago glomerata, 57. 



Somma, the great Cypress of, 100. 



Species, distribution of, discussed, 133, 

 138 ; number of, in the North Amer- 

 ican Floras. 252 ; origin of, discussed, 

 134, 172, 225. 



Spruce, the Douglas, 108. 



Sullivant, Wm. Sterling, sketch of, 376. 



Sullivantia Ohionis, 43. 



Sylva of North America, Michaux's, 

 71 ; Nuttall's, 75. 



Taxodium distichum, 112. 

 Taxodium, fossil, 159. 



