Camellia Japonica, circumnutation of leaf, 231, 232

Candolle, A. de, on Trapa natans, 95; on sensitiveness of cotyledons, 127

Canna Warscewiczii, circumnutation of plumules, 58, 59 --, of leaf, 252

Cannabis sativa, movements of leaves, 250 --, nocturnal movements of cotyledons, 307 Cannabis sativa, sinking of the young leaves at night, 444

Cassia, nyctitropic movement of leaves, 369

Cassia Barclayana, nocturnal movement of leaves, 372 --, slight movement of leaflets, 401 -- calliantha, uninjured by exposure at night, 289, n. --, nyctitropic movement of leaves, 371 -- circumnutating movement of leaves, 372 -- corymbosa, cotyledons sensitive to contact, 126 --, nyctitropic movement of leaves, 369 -- floribunda, use of sleep movements, 289 --, effect of radiation on the leaves at night, 294 --, circumnutating and nyctitropic movement of a terminal leaflet, 372, 373 --, movements of young and older leaves, 400 -- florida, cotyledons sensitive to contact, 126 --, sleep of cotyledons, 308 -- glauca, cotyledons sensitive to contact, 126 --, sleep of cotyledons, 308 -- laevigata, effect of radiation on leaves, 289, n. -- mimosoides, movement of cotyledons. 116 --, sensitiveness of, 126 --, sleep of, 308 --, nyctitropic movement of leaves, 372 --, effect of bright sunshine on cotyledons, 446 -- neglecta, movements of, 117 --, effect of light, 124 --, sensitiveness of cotyledons, 126 -- nodosa, non-sensitive cotyledons, 126 --, do not rise at night, 308 -- pubescens, non-sensitive cotyledons, 126 [page 577]

CASSIA--CRINUM

Cassia pubescens, uninjured by exposure at night, 293 --, sleep of cotyledons, 308 --, nyctitropic movement of leaves, 371 --, circumnutating movement of leaves, 372 --, nyctitropic movement of petioles, 400 --, diameter of plant at night, 402 -- sp. (?) movement of cotyledons, 116 -- tora, circumnutation of cotyledons and hypocotyls, 34, 35, 109, 308 --, effect of light, 124, 125 --, sensitiveness to contact, 125 --, heliotropic movement and circumnutation of hypocotyl, 431 --, hypocotyl of seedling slightly heliotropic, 454 --, apogeotropic movement of old hypocotyl, 497 --, movement of hypocotyl of young seedling, 510

Caustic (nitrate of silver), effect of, on radicle of bean, 150, 156; on the common pea, 160.

Cells, table of the measurement of, in the pulvini of Oxalis corniculata, 120; changes in, 547

Centrosema, 365

Ceratophyllum demersum, movements of stem, 211

Cereus Landbeckii, its rudimentary cotyledons, 97 -- speciossimus, circumnutation of stem, 206, 207

Cerinthe major, circumnutation of hypocotyl, 49 --, of cotyledons, 49 --, ellipses described by hypocotyls when erect, 107 -- effect of darkness, 124

Chatin, M., on Pinus Nordmanniana, 389

Chenopodium album, sleep of leaves but not of cotyledons, 314, 319

Chenopodium album, movement of leaves, 387

Chlorophyll injured by bright light, 446

Ciesielski, on the sensitiveness of the tip of the radicles, 4, 523

Circumnutation, meaning explained, 1; modified, 263-279; and heliotropism, relation between, 435; of paramount importance to every plant, 547

Cissus discolor, circumnutation of leaf, 233

Citrus aurantium, circumnutation of epicotyl, 28 --, unequal cotyledons, 95

Clianthus Dampieri, nocturnal movement of leaves, 297

Coboea scandens, circumnutation of, 270

Cohn, on the water secreted by Lathraea squamaria, 86, n.; on the movement of leaflets of Oxalis, 447

Colutea arborea, nocturnal movement of leaflets, 355

Coniferae, circumnutation of, 211 Coronilla rosea, leaflets asleep, 355

Corylus avellana, circumnutation of young shoot, emitted from the epicotyl, 55, 56 --, arched epicotyl, 77

Cotyledon umbilicus, circumnutation of stolons, 219, 220

Cotyledons, rudimentary, 94-98; circumnutation of, 109-112; nocturnal movements, 111, 112; pulvini or joints of, 112-122; disturbed periodic movements by light, 123; sensitiveness of, to contact, 125; nyctitropic movements of, 283, 297; list of cotyledons which rise or sink at night, 300; concluding remarks on their movements, 311

Crambe maritima, circumnutation of leaves, 228, 229

Crinum Capense, shape of leaves, 253 [page 578]

CRINUM--DESMODIUM

Crinum Capense, circumnutation of, 254

Crotolaria (sp.?), sleep of leaves, 340

Cryptogams, circumnutation of, 257-259

Cucumis dudaim, movement of cotyledons, 43, 44 --, sleep of cotyledons, 304

Cucurbita aurantia, movement of hypocotyl, 42 --, cotyledons vertical at night, 304 --, ovifera, geotropic movement of radicle, 38, 39 --, circumnutation of arched hypocotyl, 39 --, of straight and vertical hypocotyl, 40 --, movements of cotyledons, 41, 42, 115, 124 --, position of radicle, 89 --, rupture of the seed-coats, 102 --, circumnutation of hypocotyl when erect, 107, 108 --, sensitiveness of apex of radicle, 169-171 --, cotyledons vertical at night, 304 --, not affected by apogeotropism, 509 --, tips cauterised transversely, 537

Curvature of the radicle, 193

Cycas pectinata, circumnutation of young leaf, whilst emerging from the ground, 58 --, first leaf arched, 78 --, circumnutation of terminal leaflets, 252

Cyclamen Persicum, movement of cotyledon, 46 --, undeveloped cotyledons, 78, 96 --, circumnutation of peduncle, 225 --, --, of leaf, 246, 247 --, downward apheliotropic movement of a flower-peduncle, 433-435

Cyclamen Persicum, burying of the pods, 433

Cyperus alternifolius, circumnutation of stem, 212 --, movement of stem, 509

Cytisus fragrans, circumnutation of hypocotyl, 37 --, sleep of leaves, 344, 397 --, apogeotropic movement of stem, 494-496

D.

Charles Darwin

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