Natural selection in connection with geotropism, heliotropism, etc., 570
Nephrodium molle, circumnutation of very young frond, 66 --, of older frond, 257 --, slight movement of fronds, 509
Neptunia oleracea, sensitiveness to contact, 128 --, nyctitropic movement of leaflets, 374 --, of pinnae, 402 [page 585]
NICOTIANA--OXALIS
Nicotiana glauca, sleep of leaves, 385, 386 --, circumnutation of leaves, 386
Nobbe, on the rupture of the seed-coats in a seedling of Martynia, 105
Nolana prostrata, movement of seedlings in the dark, 50 --, circumnutation of seedling, 108
Nyctitropic movement of leaves, 560
Nyctitropism, or sleep of leaves, 281; in connection with radiation, 286; object gained by it, 413
O.
Observation, methods of, 6
Oenothera mollissima, sleep of leaves, 383
Opuntia basilaris, conjoint circumnutation of hypocotyl and cotyledon, 44 --, thickening of the hypocotyl, 96 --, circumnutation of hypocotyl when erect, 107 --, burying of, 109
Orange, seedling, circumnutation of, 510
Orchis pyramidalis, complex movement of pollinia, 489
Oxalis acetosella, circumnutation of flower-stem, 224 --, effects of exposure to radiation at night, 287, 288, 296 --, circumnutation and nyctitropic movement in full-grown leaf, 326 --, circumnutation of leaflet when asleep, 327 --, rate of circumnutation of leaflets, 404 --, effect of sunshine on leaflets, 447 --, circumnutation of peduncle, 506 Oxalis acetosella, seed-capsules, only occasionally buried, 518 -- articulata, nocturnal movements of cotyledons, 307 -- (Biophytum) sensitiva, rapidity of movement of cotyledons during the day, 26 --, pulvinus of, 113 --, cotyledons vertical at night, 116, 118 -- bupleurifolia, circumnutation of foliaceous petiole, 328 --, nyctitropic movement of terminal leaflet, 329 -- carnosa, circumnutation of flower-stem, 223 --, epinastic movements of flower-stem, 504 --, effect of exposure at night, 288, 296 --, movements of the flower-peduncles due to apogeotropism and other forces, 503-506 -- corniculata (var. cuprea), movements of cotyledons, 26 --, rising of cotyledons, 116 --, rudimentary pulvini of cotyledons, 119 --, development of pulvinus, 122 --, effect of dull light, 124 --, experiments on leaves at night, 288 -- floribunda, pulvinus of cotyledons, 114 --, nocturnal movement, 118, 307, 313 -- fragrans, sleep of leaves, 324 -- Ortegesii, circumnutation of flower-stems, 224 --, sleep of large leaves, 327 --, diameter of plant at night, 402 --, large leaflets affected by bright sunshine, 447 -- Plumierii, sleep of leaves, 327 -- purpurea, exposure of leaflets at night, 293 -- rosea, circumnutation of cotyledons, 23, 24 [page 586]
OXALIS--PHASEOLUS
Oxalis rosea, pulvinus of, 113 --, movement of cotyledons at night, 117, 118, 307 --, effect of dull light, 124 --, non-sensitive cotyledons, 127 -- sensitiva, movement of cotyledons, 109, 127, 128 --, circumnutation of flower-stem, 224 --, nocturnal movement of cotyledons, 307, 312 --, sleep of leaves, 327 -- tropoeoloides, movement of cotyledons at night, 118, 120 -- Valdiviana, conjoint circumnutation of cotyledons and hypocotyl, 25 --, cotyledons rising vertically at night, 114, 115, 117, 118 --, non-sensitive cotyledons, 127 --, nocturnal movement of cotyledon, 307, 312 --, sleep of leaves and not of cotyledons, 315 --, movements of leaves, 327
P.
Pachira aquatica, unequal cotyledons, 95, n.
Pancratium littorale, movement of leaves, 255
Paraheliotropism, or diurnal sleep of leaves, 445
Passiflora gracilis, circumnutation and nyctitropic movement of leaves, 383, 384 --, apogeotropic movement of tendrils, 510 --, sensitiveness of tendrils, 550 Pelargonium zonale, circumnutation of stem, 203 --, and downward movement of young leaf, 232, 233, 269
Petioles, the rising of beneficial to plant at night, 402
Petunia violacea, downward movement and circumnutation of very young leaf, 248, 249, 269.
Pfeffer, Prof., on the turgescence of the cells, 2; on pulvini of leaves, 113, 117; sleep movements of leaves, 280, 283, 284; nocturnal rising of leaves of Malva, 324; movements of leaflets in Desmodium gyrans, 358; on Phyllanthus Niruri, 388; influence of a pulvinus on leaves, 396; periodic movements of sleeping leaves, 407, 408; movements of petals, 414; effect of bright sunshine on leaflets of Robinia, 445; effect of light on parts provided with pulvini, 363
Phalaris Canariensis, movements of old seedlings, 62 --, circumnutation of cotyledons, 63, 64, 108 --, heliotropic movement and circumnutation of cotyledon towards a dim lateral light, 427 --, sensitiveness of cotyledon to light, 455 --, effect of exclusion of light from tips of cotyledons, 456 --, manner of bending towards light, 457 --, effects of painting with Indian ink, 467 --, transmitted effects of light, 469 --, lateral illumination of tip, 470 --, apogeotropic movement of the sheath-like cotyledons, 497 --, change from a straight upward apogeotropic course to circumnutation, 499 --, apogeotropic movement of cotyledons, 500
Phaseolus Hernandesii, nocturnal movement of leaves and leaflets, 368 --, caracalla, 93 --, nocturnal movement of leaves, 368 --, effect of bright sunshine on leaflets, 446 [page 587]
PHASEOLUS--QUERCUS
Phaseolus multiflorus, movement of radicles, 29 --, of young radicle, 72 --, of hypocotyl, 91, 93 --, sensitiveness of apex of radicle, 163-167 --, to moist air, 181 --, cauterisation and grease on the tips, 535 --, nocturnal movement of leaves, 368 --, nyctitropic movement of the first unifoliate leaves, 397 -- Roxburghii, effect of bright sunshine on first leaves, 445 --, vulgaris, 93 --, sleep of leaves, 318 --, vertical sinking of leaflets at night, 368
Phyllanthus Niruri, sleep of leaflets, 388 -- linoides, sleep of leaves, 387
Pilocereus Houlletii, rudimentary cotyledons, 97
Pimelia spectabilis, sleep of leaves, 387
Pincers, wooden, through which the radicle of a bean was allowed to grow, 75
Pinus austriaca, circumnutation of leaves, 251, 252 -- Nordmanniana, nyctitropic movement of leaves, 389 -- pinaster, circumnutation of hypocotyl, 56 --, movement of two opposite cotyledons, 57 --, circumnutation of young leaf, 250, 251 --, epinastic downward movement of young leaf, 270
Pistia stratiotes, movement of leaves, 255
Pisum sativum, sensitiveness of apex of radicle, 158 --, tips of radicles cauterised transversely, 534
Plants, sensitiveness to light, 449; hygroscopic movements of, 489
Plants, climbing, circumnutation of, 264; movements of, 559 --, mature, circumnutation of, 201-214
Pliny on the sleep-movements of plants, 280
Plumbago Capensis, circumnutation of stem, 208, 209
Poinciana Gilliesii, sleep of leaves, 368
Polygonum aviculare, leaves vertical at night, 387 -- convolvulus, sinking of the leaves at night, 318
Pontederia (sp.?), circumnutation of leaves, 256
Porlieria hygrometrica, circumnutation and nyctitropic movements of petiole of leaf, 335, 336 --, effect of watering, 336-338 --, leaflets closed during the day, 413
Portulaca oleracea, effect of Aecidium on, 189
Primula Sinensis, conjoint circumnutation of hypocotyl and cotyledon, 45, 46
Pringsheim on the injury to chlorophyll, 446
Prosopis, nyctitropic movements of leaflets, 374 Psoralea acaulis, nocturnal movements of leaflets, 354
Pteris aquilina, rachis of, 86
Pulvini, or joints; of cotyledons, 112-122; influence of, on the movements of cotyledons, 313; effect on nyctitropic movements, 396
Q.