Plantain, 64. Plant-fiber, 26. Planting, 65. Plant life, 69. Plover, 22, 24. Pod, 72, 73, 75. Poison-ivy, 123, 124. Poison sumac, 68. Pokeweed, 72. Pollen, 14, 65, 71, 79, 81, 119. Pollen-basket, 79. Pollen-bearing, 64. Pollen-grains, 79. Polyporus, 57. Polypody, 159. Pond, 19, 74, 124, 148, 150-152, 162, 164-167. Pool, 165, 167, 170, 171, 179, 203. Poplar, 20. Porphyry, 180. Porters, 108. Poseidon, 207. Poverty-grass, 76. Prairie, 65. Precipice, 169, 180, 182. Protective coloration, 146, 187. Puffballs, 116, 128. Pumpkins, 79. Pupa, 82, 83, 95, 96, 104-106, 108-111. Pupa-cases, 95. Purple finch, 18. Purslane, 69. Pussy-willows, 13. Queen bumblebee, 80, 81. Queen mother, 82. Queens, 98, 99, 105, 108. Quartz, 134. Rabbit, 136, 139, 145-149. Racemes, 190. Ragweed, 69, 70, 155, 161. Raid, 104, 106-109. Rainbow, 182. Rain, 130. Range, 173, 177, 189, 194. Rapids, 171, 178, 179. Raspberries, 146. Ravine, 66, 123, 169, 170, 177, 178. Red ants, 4, 102, 104-110, 112. Red cherry, 66. Red clover, 71. Redeye, 37, 50, 62, 118, 119. Red maple, 20, 126. Red owl, 34. Redpolls, 24, 162. Red-shouldered hawk, 161. Red squirrel, 125, 139-141. Redtop, 64. Redwing, 15, 31. Redwood, 186. Reindeer lichens, 57. Reptiles, 132. Requiem, 54, 207. Resourcefulness, 188. Reverie, 72, 182. Ribbon-snake, 157. Ripple marks, 5. Roads, 76. Robin, 4, 15, 34, 44-46, 143. Rock-brake, 67. Rockies, 176, 182, 183. Rock-maple, 59. Rocks, 179, 180, 183, 199, 203. Rockweed, 77, 203. Rome, 131. Rose, 31, 59, 63, 64, 72, 118, 130, 131, 148. Rose-breasted grosbeak, 47. Rose-mallow, 122. Rose pogonia, 168. Round-leaved spurge, 76. Ruby kinglet, 48, 170. Rue-anemone, 20. Ruffed grouse, 24, 156. Runways, 148. Rush, 57. Russula, 116. Saga, 198. Sailor, 206. Salt-licks, 192. Sand, 197. Sandpiper, 124. Sandstone, 59, 179, 180, 182. Sand-wasp, 89. Sanity, 187. Saplings, 154, 185. Sapphire, 199. Sapsucker, 33. Sassafras, 3. Satyr, 49, 159. Savage, 188. Savin, 113, 127. Saxifrage, 20, 170. Scapes, 71. Scarlet oak, 126. Schist, 169. Schooners, 205. Scorpions, 95. Sculpins, 77. Sea, 77, 132, 133, 164, 165, 168, 175, 179, 182, 183, 187, 196-208. Sea-bird, 207. Sea-fire, 207. Sea life, 204. Sea-mosses, 204. Sea-shells, 77, 197. Sea-urchins, 203, 204. Sedge, 150, 152. Sedge roots, 152. Sediment, 179. Seed, 64, 65, 70, 75, 119, 120, 125, 135, 145, 161-163. Seed-carrying, 64. Seedlings, 121. Self-effacement, 187. _Sense_ of the sea, 196. Sensitive fern, 57. September, 118, 122. Sequoia, 185-187. Serpent, 106. Sertularia, 204. Shadbush, 64, 123, 124. Shale, 5. Shelf fungus, 114, 146. Shellbark, 157. Shield-fern, 159. Shinleaf, 80. Shooting-star, 183. Shore, 198, 202, 203. Shrews, 139. Shrilling, 19, 53. Sierra Nevada, 185, 189. Silence, 187, 191. Silver fir, 185, 186. Silver-rod, 113. Simplicity, 188. Sky, 165, 171, 191, 194, 198, 199. Skunk, 149, 155.