Thorn, Mrs. Ashe's 185, 187 Miss Beckwith's 203, 205 Judge Brown's 185, 187 Chapman's Hill 188, 189 Dr. Clapp's 206 cock-spur 182, 183 downy 212 Eggert's 209, 210 Fretz's 203, 204 Dr. Gattinger's 206, 207 Jesup's 200, 202 large-fruited 185, 186 long-spined 188, 190 Marshall's 182 Newcastle 182 New-river 191, 192 pear 191, 193 red-fruited 212, 213 round-leaved 194, 195 scarlet 209, 211 shining 197, 198 southern 196, 197 variable 197, 199 Washington 214, 215 waxy-fruited 206, 208 =Thuja occidentalis= =32=, 33, 300 =Tiliaceæ= =255= =Tilia= =255= _americana_ _255_ =glabra= =255=, 256, 298, 300 =heterophylla= =257=, 258, 300 _heterophylla_ variety _Michauxii_ _259_ =neglecta= =259= =Toxylon pomiferum= =155= Tree of Heaven 237, 238 Trees, key to families occurring in Indiana 17 species excluded from Indiana flora 290 measurement of some of the largest found in Indiana 297 terms used to define distribution of 14 =Tsuga canadensis= =26=, 29, 300 Tulip 159, 160 Tupelo 259