502 
Oak, the Live, 98. 
Oak, the Wadsworth, 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 
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 
weeds, 234, 
Puebla, the Cypress of, 113. 
of 
of 
INDEX. 
Pycnanthemum, remarks on, 67. 
Pyrularia oleifera, 44. 
Raia Batis, Wyman’s investigation of 
the development of, 391. 
Rana pipiens, Wyman’s paper on, 389. 
Rhododendron Catawbiense, discovery 
of, 31. 
Rhus toxicodendron, 154. 
Rhus venenata, 154. 
Roan Mountain, plants on the summit 
of, 64. 
Rocky Mountains, flora of, 277. 
Reper, 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, 348. 
Saxifraga Careyana, 55. 
Scutellaria Guilielmi, 168. 
Scutellaria serrata, 40. 
Sedum pusillum, habitat of, 29. 
Sequoia and its history, 142. 
Sequoia, fossil, 159. 
Sequoia Longsdor fii, 159. 
Sequoia Sternberaii, 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 Linnzus’ herbarium, 2. 
Société d’ Arcueil, 302. 
Solidago glomerata, 57. 
Somma, the great Cypress of, 100. 
Species, distribution of, discussed, 183, 
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. 
Pursh, the Flora of, 245; sketch of, | Taxodium distichum, 112. 
| Taxodium, fossil, 159. 
245; travels in North America, 32. 
