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
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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.

Dahlia, circumnutation of young leaves, 244-246

Dalea alopecuroides, leaflets depressed at night, 354

Darkness, effect of, on the movement of leaves, 407

Darlingtonia Californica, its leaves or pitchers apheliotropic, 450, n.

Darwin, Charles, on Maurandia semperflorens, 225; on the Swedish turnip, 230, n.; movements of climbing plants, 266, 271; the heliotropic movement of the tendrils of Bignonia capreolata, 433; revolution of climbing plants, 451; on the curling of a tendril, 570 —­, Erasmus, on the peduncles of Cyclamens, 433 —­, Francis, on the radicle of Sinapis alba, 486; on Hygroscopic seeds, 489, n.

Datura stramonium, nocturnal movement of cotyledons, 298

Delpino, on cotyledons of Chaerophyllum and Corydalis, 96, n.

Delphinium nudicaule, mode of breaking through the ground, 80 —­, confluent petioles of two cotyledons, 553