Desmodium gyrans, movement of leaflets, 257, n. —­, position of leaves at night, 285 —­, sleep of leaves, not of cotyledons, 314 —­, circumnutation and nycti-[page 579]

DESMODIUM—­EUCALYPTUS

tropic movement of leaves, 358-360 Desmodium gyrans, movement of lateral leaflets, 361 —­, jerking of leaflets, 362 —­ nyctitropic movement of petioles, 400, 401 —­, diameter of plant at night, 402 —­, lateral movement of leaves, 404 —­, zigzag movement of apex of leaf, 405 —­, shape of lateral leaflet, 416 —­, vespertilionis, 364, n.

Deutzia gracilis, circumnutation of stem, 205

Diageotropism, 5; or transverse-geotropism, 520

Diaheliotropism, 5; or Transversal-Heliotropismus of Frank, 419; influenced by epinasty, 439; by weight and apogeotropism, 440

Dianthus caryophyllus, 230
—­, circumnutation of young leaf, 231, 269

Dicotyledons, circumnutation widely spread among, 68

Dionoea, oscillatory movements of leaves, 261, 271

Dionoea muscipula, circumnutation of young expanding leaf, 239, 240 —­, closure of the lobes and circumnutation of a full-grown leaf, 241 —­, oscillations of, 242-244

Diurnal sleep, 419

Drosera Capensis, structure of first-formed leaves, 414 —­ rotundifolia, movement of young leaf, 237, 238 —­, of the tentacles, 239 —­, sensitiveness of tentacles, 261 —­, shape of leaves, 414 —­, leaves not heliotropic, 450 —­, leaves circumnutate largely, 454 —­, sensitiveness of 570

Duchartre on Trephrosia cariboea, 354; on the nyctitropic movement of the
Cassia, 369

Duval-Jouve, on the movements of Bryophyllum calycinum, 237; of the narrow leaves of the Gramineae, 413

Dyer, Mr. Thiselton, on the leaves of Crotolaria, 340; on Cassia floribunda, 369, n., on the absorbent hairs on the buried flower-heads of Trifolium subterraneum, 517

E.

Echeveria stolonifera, circumnutation of leaf, 237

Echinocactus viridescens, its rudimentary cotyledons, 97

Echinocystis lobata, movements of tendrils, 266
—­, apogeotropism of tendrils, 510

Elfving, F., on the rhizomes of Sparganium ramosum, 189; on the diageotropic movement in the rhizomes of some plants, 521

Elymus arenareus, leaves closed during the day, 413

Embryology of leaves, 414

Engelmann, Dr., on the Quercus virens, 85

Epinasty, 5, 267

Epicotyl, or plumule, 5; manner of breaking through the ground, 77; emerges from the ground under the form of an arch, 553

Erythrina caffra, sleep of leaves, 367 —­ corallodendron, movement of terminal leaflet, 367 —­ crista-galli, effect of temperature on sleep of leaves, 318 —­, circumnutation and nyctitropic movement of terminal leaflets, 367

Eucalyptus resinifera, circumnutation of leaves, 244
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