INDEX, 



^55 



Naiadeae, 504, 553. 

 Naias, 473, 495, 504. 

 Nardus, 525. 

 Natural Selection, 831, 

 Natural System, 844. 

 Nectar, 500. 

 Nectary, 430, 500. 

 Negative heliotropism, 677, 



756. 

 Nelumbiaceae, 579. 

 Nemalieae, 237. 

 Neottia, 194, 620, 693. 

 Nepentheae, 578. 

 Nepenthes, 601. 

 Nidularieae, 251. 

 Nitella, 16, 285, 287, 288, 



289. 

 Nitrogen, 621. 

 Node, 135. 

 Nostoc, 215. 

 Nostocaceae, 215, 273. 

 Nostochineae, 214. 

 Nucleoli, 38, 44. 

 Nucleus, 2, 18, 37, 44, 252, 



422. 

 Nucule, 284, 289. 

 Nuphar, 539. 

 Nut, 538. 

 Nutation, 766. 

 Nutmeg, 512. 

 Nyctagineae, 583. 

 Nymphaeaceae, 576, 579. 



Ochnaceae, 583. 

 CEdogonieae, 229. 

 CEdogonium, 9, 22, 230. 

 CEnothereae, 585. 

 Oil, 55, 115. 

 Oleaceae, 566, 580. 

 Onygenaceae, 256. 

 Oogonium, 3, 203, 212, 802. 

 Oosphere, 203, 212, 8cr2. 

 Oospore, 213, 803. 

 Opening and closing of 



flowers, 798. 

 Operculum, 330. 

 Ophioglossaceae, 378. 

 Ophioglossum, 379, 381. 

 Ophrydeae, 488. 

 Orchideae, 488, 505, 506, 



526, 556, 814. 

 Orchis, 502, 536, 

 Order of development of 



roots, 143. 

 Order of succession of the 



parts of the flower, 530. 

 Organic centre, 182. 

 Organic processes, 693. 

 Organs of plants, 128. 

 Origin of species, 822. 

 Original forms of plants, 128. 

 Orobanche, 194, 241, 557. 

 Orobancheae, 580. 

 Orthostichy, 167. 



Orthotropous, 427, 501. 

 Oscillatoria, 215. 

 Oscillatorieae, 215. 

 Osmunda, 341. 

 Osmundaceae, 360. 

 Ovary, 429, 466, 488. 

 Ovule, 203, 427, 501, 504. 

 Oxalideae, 583. 

 Oxalis, 787, 796. 

 Oxygen, 621. 



Paleae, 129, 347, 356, 554. 



Pallisade-tissue, 465, 657. 



Palmaceae, 552, 554. 



Palmellaceae, 263, 



Pandanaceae, 554. 



Pandorina, 219. 



Panicle, 520. 



Papaver, 571. 



Papaveraceae, iii, 571, 579. 



Papayaceae, no, 582. 



Papilionaceae, 584. 



Pappus, 471, 540, 841. 



Paraphyses, 251, 293, 356. 



Parasites, 194, 241, 557,572, 

 620, 643, 844. 



Parasitism of Lichens, 263, 

 273. 



Parastichy, 173. 



Paratonic condition, 677. 



Parenchyma, 78, 100. 



Parietales, 582. 



Paris, 167. 



Parnassia, 566, 766. 



Paronychieae, 569, 583. 



Parthenogenesis, 805. 



Passiflora, 776, 780. 



Passifloraceae, 582, 



Pastinaca, 162. 



Pediastrum, 68, 217. 



Peduncle, 426. 



Peltigera, 264. 



Perianth, 293, 309, 426, 

 469. 



Periblem, 126. 



Pericambium, 144, 353. 



Pericarp, 236, 518, 537. 



Perichaetium, 293, 309, 320. 



Periderm, 81, 90. 



Peridium, 239, 251, 253. 



Perigonium, 320. 



Perigynae, 584. 



Perigynous, 489. 



Periodic movements of or- 

 gans, 782. 



Periodicity of growth in 

 length, 743. 



Perisperm, 428, 512. 



Peristome, 331. 



Perithecium, 256, 258. 



Permanent tissue, 79. 



Peronosporeae, 244. 



Pertusaria, 264, 271. 



Petal, 470. 



Petiole, 191, 564. 



Peziza, 11, 261. 



Phaeosporeae, 229, 



Phalloideae, 253. 



Phallus, 254. 



Phascaceae, 329. 



Phaseolus, 24, 126, 146, 492. 



559- 

 Phelloderm, 91. 

 Phellogen, 90. 

 Philadelpheae, 584. 

 Phloem, 94, 100. 

 Phloem-layers of fibrovas- 



cular bundles, 100. 

 Phloem-sheath, 419. 

 Phlomis, 494. 

 Phoenix, 542. 

 Phosphorescence, 646. 

 Phosphorus, 622. 

 Phototonus, 790. 

 Phycocyanine, 216, 686. 

 Phycoerythrine, 234, 237, 



686. 

 Phycomycetes, 240, 242. 

 Phycophaeine, 226. 

 Phvcoxanthine, 223, 226, 



686. 

 Phyllanthaceae, 583, 

 Phyllantheae, 583. 

 Phyllocladus, 450. 

 Phyllode, 202, 408. 

 Phylloglossum, 407. 

 Phylloid, 211. 

 Phyllome, 130, 136. 

 Phyllopode, 420. 

 Phyllophyte, 130. 

 Phyllotaxis, 167, 173, 348. 

 Physarum, 275. 

 Physcia, 272. 

 Phytelephas, 512. 

 Phytolacca, 569, 576. 

 Phytolaccaces, 569, 583. 

 Pileus, 249, 254. 

 Pilularia, 32, 392, 395, 396, 



397. 

 Pine-apple, 537. 

 Pineae, 460. 

 Pinus, 25, 31,70,72, 89, 105, 



442, 449, 465. 

 Piperaceae, 495, 504, 578. 

 Piperineae, 578. 

 Pisum, 52. 



Pitcher-like organs, 601. 

 Pith, 108, 717. 

 Pitted vessels, 26. 

 Pittosporeae, 582. 

 Placenta, 427, 488. 

 Plane of insertion, 167. 

 Plane of symmetry, 183. 

 Plantagineae, 566, 580. 

 Plasmodium, 10, 39, 275, 



760. 

 Platanaceae, 578. 

 Platycerium, 347. 



