INDEX 



377 



seeds from birds in, 98 ; aiding ger- 

 mination in. 98, 99 ; protection from 

 bright sunlight in, 99 ; care and 

 cultivation of plants in, 100 ff. ; 

 abundant supply of water essential, 

 100 ; surface irrigation in, 100, 101 ; 

 pulverizing surface soil in, 101 ; pro- 

 tection of seedlings in winter in, 

 102-104; best fertilizers for, 104- 

 106 ; thinning out, 106 ; removal of 

 plants from, 106, 107, 109; root- 

 pruning in, 107, 108 ; " heeling-in," 

 108, 109. 



Nursery, transplant, defined, 89, 111 ; 

 purpose of, 111; a simple affair, 

 113; fertilization and preparation 

 of, 113, 114 ; cultivation of, 114. 



Nut-bearing trees. See Trees, nut- 

 bearing. 



Nysta aquatica (tupelo gum), 340, 

 341. 



Nyssa sylvatica (black gum), 339, 

 340; known by diverse names in 

 different states, 339. 



Oak, black. See Quercus velutina. 

 Oak, burr. See Quercus macrocarpa. 

 Oak, chestnut. See Quercus prinus. 

 Oak, chinquapin. See Quercus acu- 



minata. 



Oak, cow. See Quercus michauxii. 

 Oak, Garry. See Quercus garryana. 

 Oak, mossycnp. See Quercus macro- 

 carpa. 



Oak, overcup. See Quercus lyrata. 

 Oak, pin. See Quercus palustris. 

 Oak, post. See Quercus minor. 

 Oak, red. See Quercus rubra. 

 Oak, rock. See Quercus prinus. 

 Oak, scrub, 39. 

 Oak, southern red. See Quercus tex~ 



ana. 

 Oak, Spanish. See Quercus pagodce- 



folia. 

 Oak, swamp white. See Quercus pla- 



tanoides and Q. lyrata. 

 Oak, tan. See Quercus prinus. 

 Oak, tanbark. See Pasania densi- 



flora. 

 Oak, valley white. See Quercus lo- 



bata. 

 Oak, white, 262. And see Quercus 



alba. 



Oak, yellow. See Quercus acuminata. 

 Oak bark, tannic acid in, 75. 

 Oaks, certain species of; may recur 



in second growth, 18 ; number of 

 species in U. S.,231; division of, into 

 classes, 231 and n., 232 ; species on 

 Pacific slope, 352-354. Sea species 

 under Quercus. 



Oaks, red, 231, 247-257. 



Oaks, white, 232, 246. 



" Oh-neh-tah," 203. 



" Oo-soo-hoo-tah," 210. 



Pacific slope, broadleaf trees of, 351- 



357. 

 Pasania densi flora (tanbark oak), 



353 ; a link between oak and chest- 

 nut, 353. 

 Pearlash, 278. 



Pennsylvania Forest Department, 41. 

 Pennsylvania Forest Nursery, 103, 



104. 



Pepperidge, 339. 

 " Perfect " flowers, 63, 64. 

 Phosphoric acid, in soil, comparative 



amount of, required by trees and 



by crops, 36. 

 Picea canadensis (white spruce), 182 ; 



forms great bulk of forests of 



Alaska and No. Canada, 182. 

 Picea engelmanni (Engelmann's 



spruce), 183-185. 

 Picea excelsa (Norway spruce), 185- 



188 ; an imported tree, 185. 

 Picea rubens (red spruce), 179-182 ; 



wood of, used mostly for pulp, 180, 



181. 

 Picea sitchensis (tideland spruce), 178, 



199. 



Pignut. See Hicoria glabra. 

 Pine, bull. See Pinus ponderosa. 

 Pine, cork, 140. 

 Pine, Cuban, 152. And see Pinus 



heterophylla. 

 Pine, Eastern white. See Pinus stro* 



bus. 



Pine, Georgia. See Pinus palustris. 

 Pine, hazel, 339. 



Pine, Jeffrey. See Pinus jeffreyi. 

 Pine, Jersey. See Pinus virginiana. 

 Pine, loblolly. See Pinus tasda. 

 Pine, lodgepole. See Pinus murray- 



ana. 



Pine, longleaf. See Pinus palustris. 

 Pine, northern. See Pinus strobus. 

 Pine, Norway, 176. And see Pinus 



resinosa. 



Pine, nut. See Pinus monophyUa. 

 Pine, old-field. See Pinus Ueda. 



