600 
INDEX 
All numbers refer to pages, heavy type indicating illustrations. 
Pine grove illustrating mutual ac- 
commodation, 453, 454 
Pine Order, 393, 397, 426, 427 
Pines, 550 
Pineapple, 88, 103, 121, 124, 233; 
fiber, 232; gall, 272 
Pineapple-cloth, 234 
Pineapple Family, 397: pineapple, 
103; southern moss, 234 
Pin-mold, 495, 496, 497 
Pin-mold Family: pin-mold, 496, 
497 
Pin-mold Fungi, 495 
Pink Family, 398 
Pinnate, 341; nervation, 352 
Pinnately, compound, 341; nerved, 
341 
Pinus sylvestris, Scotch Pine 
Piperacee, Pepper Family 
Piperales, Pepper Order 
Piper nigrum, Black Pepper 
Piping, 287 
Pistil, 11, 14, 308, 319, 345; com- 
pound, 347; simple, 347 
Pistillate flowers, 347 
Pistil, parts of, ovary, 345; ovule, 
346; placenta, 346; stigma, 345; 
style, 345 
Pisum sativum, Pea 
Pith, 250, 254 
Pith-rays, 250, 253, 254 
Pivotal place of plants in economy 
of nature, 574 
Placenta, 346; axile, 355; dorsal, 
346; parietal, 362; ventral, 346 
Plaiting, 223, 235 
Planetesimal hypothesis, 465 
Plane-tree, 267, 268 
Plane-tree Family, 399: American 
sycamore, 267 
Planks, 270 
Plantaginacee, Plantain Family 
Plantaginales, Plantain Order 
Plantain Family, 401 
Plantain Order, 401 
Plant, formulas, 352; groups, 358; 
names, early, 3 , 
Plant life and human life, 575 
Plants, annual, 11; biennial, 52; 
compass, 73; dicecious, 360; 
habit of, 359; monoecious, 374; 
ocreate, 372; perennial, 58; 
polygamous, 347; shrub, 36; 
tree, 36; glabrous, 343; pubes- 
cent, 343 
ee and animals defined, 573, 
574 
Plants, how named, 2; in general, 
574; our dependence upon, 1; 
needs of, 2 ; 
Plant’s place in Nature, 561 
Plants poisonous, to eat, 192; to 
handle, 217 
Plant segment, 324 
Platanacee, Plane-tree Family 
Platanus occidentalis, American 
Sycamore 
Pleurococcacee, Wall-stain Algae 
Pleuroccus vulgaris, Waill-stain 
Alga 
Plicate zestivation, 381 
Plicate-convolute xstivation, 381 
Plum, 88, 90, 121, 124, 364; wood, 
357, 263 
ae 48, 317, 318, 319, 546, 
5 
Podded Jute, 232 
Poison, Dogwood, see  Poison- 
sumac; Hemlock, 194, 195, 209, 
370, 410, 411 
Poison-ivy, 217, 218, 219 
Poison-oak, see Poison-ivy 
Poisonous bark, 196; drugs, 176; 
flowers, 205, 208; fruits and 
seeds, 209; herbage, 199; honey, 
205, 207, 208; mushrooms, 111, 
213; juice, 357; plants, 112, 162, 
163, 192, 219; substances, 302; 
underground parts, 192; volatile 
oils, 177 
Poisons, 162; as by-products, 192 
Poison-sumac, 217, 220 
Poke, Indian, 390, 424, 425 
Pokeweed, 195, 196, 208, 209 
Pokeweed Family, 398: pokeweed, 
195, 196 
Polemoniales, Phlox Order 
Poles, 245, 270 
Pollen, 12, 14, 319; grain, 550, 
551, 556 
Pollen-sacs, 325, 326 
Pollen-tube, 551, 555, 556 
Pollination, 557 
Polygamous flowers, 347, 354 
