Christmas fern, 158. Christmas green, 158. Cicada, 50, 53. Cinnamon fern, 122. Cinquefoil, 57. Cirque, 181. City, 189. Cladonia, 126, 159. Claw, 86. Clearing, 190. Clethra, 80, 148, 168. Cliff, 66, 67, 132, 169, 174, 179-183. Cliff-brake, 170. Clintonia, 1, 57, 113, 114. Cloud, 173, 174, 180, 183, 194, 200. Clover, 57, 71. Club-mosses, 158. Coast Range, 186. Cocoa-bean, 72. Cocoons, 93, 95, 96. Cod, 205. Colony, 94, 95, 97, 99, 102, 107-111. Columbines, 21, 66, 67, 121. Column, 104-106, 110, 111. Combat, 103. Companionship, 10, 173. Competition, 69. Cones, 125, 158, 162, 163, 186. Conifers, 158, 185, 186. Coniferous, 141. Connecticut Valley, 21. Constellations, 130. Coon, 149. Coots, 124, 203. Copper salts, 206. Co-operation, 98. Corridors, 95. Cotton-fields, 47. Cottontail, 126. Court of the Winds, 163. Coves, 200. Cow-bell, 177. Cowbird, 36-38. Coyotes, 191. Crabs, 203. Cranberry-bog, 57. Crane's-bill, 65. Creek, 169. Creepers, 39, 159. Crest, 203. Crickets, 51, 52, 54, 72. Crop, 128. Crossbills, 24, 162, 163. Crow, 16, 17. Crystals, 133. Cuckoo, 31. Curlew, 23. Cyperus, 114. Daghestan, 126. Daisies, 59, 66. Dandelions, 70, 71, 131, 135. Dawn, 45, 47, 191-194. Daybreak, 192. Death-song, 55. Deep, 204, 205, 207. Deer, 138, 156, 192. Dell, 80. Desert, 131, 183, 198, 199. Deserters, 107. Devonian, 5. Dexterity, 188. Dicentra, 20, 59, 170. Dicksonia, 59, 122. Dodder, 69. Dog, 136. Dog-days, 87, 114, 122. Dogwood, 30, 58, 157. Dory, 205. Douglas spruce, 185. Doves, 7. Downy woodpecker, 159. Downy yellow violets, 21. Driftwood, 205-207. Dromedary, 132. Drumming, 16. Dwarf-sumac, 80, 124. Earthquake, 182. Earth-spirit, 130. East wind, 198. Ebb-tide, 200, 204. Echo, 190. Edible, 115. Eggs, 81, 82, 84, 85, 91, 93, 99, 105, 110, 112, 121, 132, 160. Egypt, 131. Elder, 63. Elm, 20, 30, 163, 186. Elysian fields, 71. English pheasant, 42. Epithalamium, 54. Erigone, 88. Erythronium, 1, 20. Europe, 70. Eurydice, 179. Evolution, 97. Exodus, 101, 109, 110. _Face_ of the waters, 199. Fall, 151. Fall dandelions, 71. False hellebore, 68. Farm, 128. Faulting, 179. Faun, 49, 126, 159. February, 140. Feeding-grounds, 152. Feldspar, 134. Fern, 57, 131, 158. Fern moss, 68, 117. Fields, 22, 42, 43, 48, 57, 59, 71, 72, 74, 76, 79, 115, 127-129, 205. Field-sparrow, 1, 43, 118. Filaments, 78. Finch, 18, 190. Fir, 185, 186. Fire, 192-194. Fireweed, 75. Fish, 77, 192. Fisherman, 171. Flight, 88, 98-100, 120. Flood, 204. Florida, 25. Fly, 78, 86. Flycatcher, 37, 119. Fog, 173, 183, 184, 194. Forest, 34, 42, 44, 56, 62, 65, 78, 82, 100, 117, 136, 163, 178, 181, 185, 187-193, 195. Forest cathedrals, 186. Food plant, 112. Foreglow, 194. _Formica pennsylvanica_, 102. Formicary, 97, 99. Fox, 148, 149, 156. Fox-sparrows, 16. Freedom, 112, 177, 201. Frogs, 18, 19, 51, 114, 144, 155. Fossils, 131. Fronds, 159. Frost, 129, 135, 181.