Adenanthera pavonia, nyctitropic movements of leaflets, 374

Aecidium elatinum, effect on the lateral branches of the silver fir, 188

Aesculus hippocastanum, movements of radicle, 28, 29
—­, sensitiveness of apex of radicle, 172-174

Albizzia lophantha, nyctitropic movements of leaflets, 383
—­, of pinnae, 402

Allium cepa, conical protuberance on arched cotyledon, 59 —­, circumnutation of basal half of arched cotyledon, 60 —­, mode of breaking through ground, 87 —­, straightening process, 101 —­ porrum, movements of flower-stems, 226

Alopecurus pratensis, joints affected by apogeotropism, 503

Aloysia citriodora, circumnutation of stem, 210

Amaranthus, sleep of leaves, 387
—­ caudatus, nocturnal movement of cotyledons, 307

Amorpha fruticosa, sleep of leaflets, 354

Ampelopsis tricuspidata, hyponastic movement of hooked tips, 272-275

Amphicarpoea monoica, circumnutation and nyctitropic movements of leaves, 365 —­, effect of sunshine on leaflets, 445 —­, geotropic movements of, 520 [page 575]

ANODA—­BRASSICA

Anoda Wrightii, sleep of cotyledons, 302, 312 —­, of leaves, 324 —­, downward movement of cotyledons, 444

Apheliotropism, or negative heliotropism, 5, 419, 432

Apios graveolens, heliotropic movements of hypocotyl, 422-424 —­ tuberosa, vertical sinking of leaflets at night, 368

Apium graveolens, sleep of cotyledons, 305
—­, petroselinum, sleep of cotyledons, 304

Apogeotropic movements effected by joints or pulvini, 502

Apogeotropism, 5, 494; retarded by heliotropism, 501; concluding remarks on, 507

Arachis hypogoea, circumnutation of gynophore, 225 —­, effects of radiation on leaves, 289, 296 —­, movements of leaves, 357 —­ rate of movement, 404 —­, circumnutation of vertically dependent young gynophores, 519 —­, downward movement of the same, 519

Arching of various organs, importance of, to seedling plants, 87, 88; emergence of hypocotyls or epicotyls in the form of an, 553

Asparagus officinalis, circumnutation of plumules, 60-62. —­, effect of lateral light, 484

Asplenium trichomanes, movement in the fruiting fronds, 257, n.

Astragalus uliginosus, movement of leaflets, 355

Avena sativa, movement of cotyledons, 65, 66. —­, sensitiveness of tip of radicle to moist air, 183 —­, heliotropic movement and circumnutation of cotyledon, 421, 422 —­, sensitiveness of cotyledon to a lateral light, 477 —­, young sheath-like cotyledons strongly apogeotropic, 499

Avena sativa, movements of oldish cotyledons, 499, 500

Averrhoa bilimbi, leaf asleep, 330 —­, angular movements when going to sleep, 331-335 —­, leaflets exposed to bright sunshine, 447

Azalea Indica, circumnutation of stem, 208