Perch Pond (Vt.), 69. _See_ Pownal Pond Perkins’ Hill, 188 _Pes Aquilegia_, origin of name, 168 _Pes Columbinus_, origin of name, 169 Petersburgh Hills, 203 _Phegopteris hexagonoptera_, 160 _P. Dryopteris_, 160 _Phlox subulata_, 157. _See_ Rock Pinks Pickerel-Weed, 64 Pied de Pigeon, 169 Pigeon Cherry Blossoms, 119 Pine Grove, Pownal Pond, 143; trees, 87, 141, 165; rest beneath, 146 _Pinus resinosa_, 117 _P. rigida_, 186 _P. divaricata_, 117 _P. Mariana_, 117 Pinxter-Flower, 232 Pipsissewa, 24 Pitcher Plant, haunts, 32, 33, 35, 65, 67, 69, 105, 142, 181 Pittsfield (Mass.), stages to, 198 Plains, Huckleberry, 115 _Plant World, the_, cited, 126, 169 Platt, “a friend of mine,” a character of Hawthorne’s, 218, 219 Pleasant Valley, Orange Mountains (N. J.), 234 Pleurisy-Root, 234 Pliny, orchises known to, 109; _Natural History_ quoted, 240 Plymouth (Mass.), 24 Poe Cottage, Bedford Park (N. Y. City), 161 =Pogonia=, generic description, 259; haunts, 62, 63, 70, 73, 83, 85, 88, 125, 178, 181, 202; delicate, 89; origin of name, 90, 259; New England species, 259. _See_ Sweet Pogonias =P. affinis=, specific description, 261; origin of name, 261 =P. ophioglossoides=, specific description, 260; origin of name, 90, 260; flowers, 90, 94; fragrance, 90; roots, 91; fertilization, 94. _See_ Snake-Mouth _Pogonia_ =P. trianthophora=, specific description, 260; origin of name, 260; range, 260 =P. verticillata=, 187; specific description, 261; origin of name, 261 Point of Rocks, Mosholu, and Lowerre (N. Y.), 161, 164, 165 Pollen and Pollinia of Orchids, 93 Pollywogs, or tadpoles, 63, 69, 144 _Polygonum amphibium_, 84, 143; name of, 84; genus, 144, 145 _Polypodium vulgare_, 14 Polypody Ferns, 194, 212 Polypores, haunts, 149-152, 186; structure, 151; seeds or spores, 151; origin of name, 151 Poppy Family, 164 Pot-hole erosions, origin, 189, 190, 220, 221; formation of Wash-Tub Brook, 189; ancient revolving stone, Bronx Park (N. Y. City), 190; Deerfield Arch, 222; Natural Bridge Chasm, 226. _See_ Erosions _and_ Natural Bridge Pownal (Vt.), District Thirteen, 63 Pownal (Vt.), District Fourteen, 15, 16, 25, 36, 39, 44, 57, 139, 171; schoolhouse in, 62, 75, 89 Pownal, Bennington County (Vt.), only town of the State through which the Hoosac River flows, 63, 116, 121, 133, 135, 188, 193, 213, 220, 236; Oak Hill Cemetery, 141 Pownal Centre (Vt.), 27, 174, 191, 199, 200, 204; road, 36, 41, 198. _See_ Centre-of-the-Town Pownal Pond (Vt.), 16, 27, 28, 31, 62, 84, 143, 176, 180; glacial hills around, 68; picnic grove, 143. _See_ Perch Pond Prince’s Pine, 24, 187 Prune or Plum, origin of names, 119 _Prunus Pennsylvanica_, 119