INDEX 



821 



Ononis, i)37. 



Oogonium, 695 (Fig. 233). 



Oomycetes, 588, 692. 



Oospliere, 273, 695 (Fig. 233). 



Oosfiora, 710. 



Oospore, 695 (Fig. 233). 



Open bundle, 117. 



Orache, 351, 600. 



Orange, 278. 



Orchard-grass, 541. 



Orchideae, 281, 329, 



Orchids, 280. 



Orchis, 101, 329. 



Order, 322. 



Organs, reproductive, 269. 



vegetative, 78. 



Organic acids, 164. 

 Organised ferments, 780. 

 Ornithopus, 434, 439. 

 Orobanche^ 172, 599. 

 Orthotropous ovule, 272 (Fig. 98). 

 Osier, 65. 

 Osmosis, 177, 203. 

 Osmotic pressure, 178. 



substance, 178. 



Ovary, 85 (Fig. 38). 



Ovate, 70 (Fig. 38). 



Ovule, 85, 271, 277 (Figs. 99, loi). 



Ovum, 273 (Figs. 99, 100, 101). 



Ox-eye daisy (Fig. 147), 607, 649. 



Oxalate of calcium, 164, 174. 



Oxalic acid, 164, 174. 



Oxalis, 164. 



Oxygen, 171, 233-238, 775. 



Pacey's rye-grass, 549, 675. 



Palea, 91, 479 (Fig. 150). 



Palisade parenchyma (Fig. 75), 147. 



Palmate, 71. 



Palmately-veined, 69. 



Palmatifid, 70. 



Palmatipartite, 70. 



Palmatisect, 70. 



Panicle, 92 (Figs. 41, 149), 480. 



Pansy, 279, 317 (Fig. 202), 652. 



Papilionacese, 410. 



Papilionaceous, 410. 



Papaver, 590. 



Papaveracea5, 326, 590. 



Pappus, 83, 472 (Fig. 148). 



Paradise apple, 30, 32, 263. 



Parallel-veined, 69. 



Paraphyses, 743 (Fig. 252). 



Parasites, 208, 684, 687. 



Parenchyma, 112. 



Parietal, 87 (Fig. 58). 



Parthenogenesis, 269. 



Partridge pea, 415. 



Parsley, 92, 280, 444. 



Parsley, hedge, 102. 



Parsnip, 69, 92, 97, 312, 443, 452. 



seed, 657. 



varieties of, 453. 



wild, 312. 



Passion-flower, 74. 



Pasteurisation, 776, 805. 



Pastinaca, 452. 



Pastures, temporary and permanent, 



556-570- 



weeds of, 604. 



Pathogenic bacteria, 804. 



Pea (Figs. 33, 37, 72, 127, 194), 71, 74, 



83, 276, 284, 412. 



varieties of, 414-415. 



Pea-mildew, 757, 



Peach, 49, 263, 300, 305, 400. 



Peacock barley, 504 (Fig. 161). 



Pear, 30, 32, 39 (Figs. 17, 18, 20, iz6), 



49, 66, 82, 100, 189, 260, 262, 263, 



267, 278, 280, 310, 405. 

 Pectin, 161. 

 Pectose, 161. 

 Pecto-celluloses, 161. 

 Pedicel, 89. 

 Pedicularis, 225, 576. 

 Peduncle, 78, 89. 

 Pelargonium, 259, 287, 305. 

 Pentosans, 162, 796. 

 Peptones, 231. 

 Perennials, 4, 223, 578. 

 Perennial rye-grass, 548 (Figs. 186,223), 



553. 675- 

 Perianth, 83. 



Periblem, 149 (Figs. 76, 77, 100). 

 Pericarp, 95. 



Pericycle, 116 (Fig. 60), 141. 

 Periderm, 128 (Fig. 59), 129. 

 Perigynous, 82 (Fig. 35). 

 Periplasm, 695. 

 ■Perisperm, 277. 

 Perithecium, 748 (Fig. 255). 

 Permanent grasses, 563. 



pasture, 561, 562, 565. 



tissue, III. 



Peronospora, 713 (Fig. 238). 

 Persistent, 83. 

 Petals, 79 (Figs. 34, 35). 

 Petaloid, 83. 

 Petiole, 68, 69. 

 Petasites, 6iyj. 

 Peucedanum, 443, 452. 

 Phanerogams, 3, 323, 324. 



