INDEX. 
Terminology of xstivation, 181. 
Tertiary arctic forests, 160; vegeta- 
tion of Greenland, 227. 
Thalictrum clavatum, 39. 
Thalictrum Richardsonii, 39. 
Tilia heterophylla, 37. 
Torrey, John, sketch of, 359. 
Torrey and Gray’s Flora, 249. 
Torreya, distribution of, 149; geneal- 
ogy of, 161; pilgrimage to, 189. 
Tortworth, the Chestnut of, 94. 
Trautvetteria palmata, 44. 
Trees, absence of, from the pampas, 
263; manner of determining their 
age discussed, 84; manner of growth 
of, described, 80; of Canada and 
Great Britain contrasted, 266; the 
Songevity of, 71. 
Troglodytes Gorilla, Wyman’s paper 
on, 386. 
Trons, the Syeamore-Maple of, 89. 
Trumbull, J. H., letter on the Jerusa- 
lem Artichoke, 198. 
Tuckerman, Edward, sketch of, 491. 
Vaccinium Constable, 65. 
Vaccinium erythrocarpum, 45. 
Vaccinium macrocarpum, 167. 
Varieties, do they wear out or tend to 
wear out ? 174. 
503 
Varieties, gender of names of, 257. 
Vegetable kingdom, history of, dis- 
cussed, 140. 
Vegetation, aspects of North Ameri- 
ean, 143, 261. 
Veratrum parviflorum, 48. 
Vienna, herbarium at, 18. 
Wadsworth Oak, 97. 
Walker-Arnot, George A., sketch of, 
347, 
Ward, Nathaniel Bagshaw, sketch of, 
349, 
Webb, P. Barker, herbarium of, 16. 
Weed, definition of a, 234. 
Weeds of California, 241; of eastern 
North America, 241; origin of Amer- 
ican, 255; pertinacity and predomi- 
nance of, 254. 
Welwitsch, Frederick, sketch of, 358. 
White Pine, the, 107. 
Wight, Robert, sketch of, 356. 
Wistaria, 154. 
Wright, Charles, sketch of, 468. 
Wyman, Jeffries, sketch af. 377. 
Yew-trees, ancient, 103; of Fountains’ 
Abbey, 104. 
Zigadenus glaucus, 49. 
