5o8 



THE STORY OF PLANT LIFE 



Phytolaccaceae, 191 

 Pine, 52, 75 



„ Group, 268 

 Pinewoods, 79 

 Pinguicula, 162 



,, vulgaris, 1 63 (166) 



Pinus, 186 



,, pinaster, 325 

 Pipewort, 147 



Group, 316, 342 

 Pistia, 354 

 Pistil, 40. 43, 45, 46 

 Pitcher leaves, 29 

 Pith, 22 

 Plant formations, 66, 70 



,, geography, 66 

 Plantaginaceae, 135 

 Plantago, 136 



wayor, 137(138) 

 Plantain Group, 135 

 Plantains, 135, 186, 370 

 Plautus, 327 

 Pliny, 172, 183, 186, 221, 225,231, 



236, 242, 247, 255, 305, 370, 398 

 Pliocene times, 93 

 Plumule, 2, 4, 5, 6, 2^ 

 Polemoniaceas, 1 09 

 Polemonium cceruleum, 1 10 (112) 

 Pollen, 19, 44, 45 

 Pollen-grains, 18, 19, 35, 45 

 Pollen-tube, 19 

 Pollination, 21, 40, 41, 42, 43, 44, 



46 

 Polygonaceae, 190, 206 

 Polygonum Persicaria, 208 (210) 



„ tinctorittm, 208 



Polypetalse, 53, 189 

 Polypomphylox, 162 

 Pond Sedge, 394 

 Pondweed Group, 368, 374 

 Pondweeds, 270, 378 



Poplar, 224, 225, 253, 259, 260 



Poppies, 124, 261 



Populus monilifera, 1,(i\ (262) 



,. nigra, 261 

 Portland Arrowroot, 361 

 Portulacese, 191 

 Potameae, 374 



Potamogeton heterophyllus, 378 

 „ natans, 378 (380) 



,, polygonifolius, 378 



Potamogetonaceae, 374 

 Potato, 128 



Pre-Cambrian beds, 89 

 Pre-Glacial flora, 93 



,, land connection, 95 



period, 94 

 Preservation of game, 75 

 Prickly Twig Rush, 388 

 Primrose Group, 162 

 Primulaceas, 189 

 Primulas, 64 

 Prior, Dr., 233 

 Privet, 96, 98, 99 

 Proangiosperm, 61 

 Propagation, 14 

 Proteaceae, 215 

 Prothallium, 19 

 Prothallus, 19 

 Protista, 9 

 Protophyta, 9 

 Protozoa, 9 



Proximity to the sea, 71 

 Pteridosperms, 90, 92 

 Purple Crocus, 299, 300 



„ Moor Grass association, 

 86 



,, Toadflax, 143 



Quercineae, 254 



Quickly flowing stream, plant for- 

 mations of, 84 



