The Power of Movement in Plants

Natural selection in connection with geotropism, heliotropism, &e., 570 Nobbe, on the rupture of the seed- cuats ina seedling of Martynia, Nyctitropism, or sleep of leaves, 281; in connection with radia- tiun, 286; object gained by it, Opuntia basilaris, conjoint circum- nutation of hypocotyl and coty- ledon, 44 , circumnutation and nycti- tropi? movement in full-grown leaf, 326 Oxalis acetosella, seed-capsules, only occasionally buried, 518 —_ (Biophytum) sensitiva, ra pidity of movement of cotyledons during the day, 26

—, movements of the flower-pe- duncles due to apoyeotropism and other forces, 503-506 —— Valdiviana, conjoint cireum- nutation of cotyledons and hypo- cotyl, 25 Passiflora gracilis, circumnutation and nyctitropic movement of haves, 883, 384 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 Desn:o- dium qyrans, 358; on Phyllan- thus Nirurt, 288; influence of a pulvinus on leaves, 36; perind‘c movements of sleeping leaves, 407, 102; movements of petals, 414; cff-ct of bright sunshine on leaflets of Robinia, 445; effect of light on parts provided with pul- vini, 363

——.,, hcliotropic movement and cir- cumnutation of cotyicdon towards a dim lateral light, 427 —, effect of exclusion of light from tips of cotyledons, 456 ——,, apogeotropic movement of the sheath-like cotyledons, 497 —, change from uw straight up» ward apogeotrojic course to cir- cumnutation, 499 Phaseolus Hernandesit, nocturnal movement of leaves and leaflets, —-, nyclitropic movement of the first unifoli:te leaves, 397 — Roxburghii, effect of bright suushi ie ou tirst leaves, 445

Pincers, wooden, through which the radicle of a bean was allowed tu grow, 75 Plants, sensitiveness to light, 449; hygroscopic movements of, Porlieria hygrometrica, cireum- nutation an! nyctitropic move ments of petiole of leaf, 335, Primula Sinensis, conjoint circum- nutation of hypocotyl and coty- ledon, 45, 46 Pulvini, or joints; of cotyledons, 112-122; influence of, on the movements of cotyledons, 313; effect on nyctitropic movements, Quercus (American sp.), circumnus tation of young stem, 53, 54

Radicles, manner in which they penetrate the ground. 69-77 ; cir- cumnutation of, 69; experiments with split sticks, 74; with wooden pincers, 75 ; sensitiveness of apex to contact and other irri- tants, 129; of Vicia faba, 132- 158; various experiments, 135- 140; summary of results, 143-151; power of an irritant on, com- pared with geotropism, 151-154 ; sensitiveness of tip to moist air, 180; with greased tips, 185; effect of killing or injuring the primary radicle, 187-191; curvature of, 193; affected by moisture, 198; tip alone sensitive to geotropism, 549; protrusion and circumnutation ina gurmina- ting seed, 548; tip highly sen- sitive, 550; the tip acts like the brain of one of the lower animals,

——, secondary, sensitiveness of the tips in the bean, 154; become vertically geotropic, 186-191 Ramey on the movements of the cotyledons of Mimosa pudica, and Clianthus Dampieri at night, Rattan, Mr., on the g-rmination of the seeds of Megarrhiza Califor- nica, 82 Reseda odorata, hypocotyl of seed- ling slightly heliotropic, 454 Ricinus Borboniensis, cireumnuta- tion of arched }:ypocotyl, 53 Sacus on “revolving nutation,” 1; intimate connection between tur- gescence and growth, 2,n.; coty- ledon of the onion, 59; adapta- tion of root-hairs, 69 ; the move- ment of the radicle, 70, 72, 73; movement in the hypocotyls of the bean, &c., 91; sensitiveness of radicles, 131, 145, 198; sensi- tiveness of the primary radicle in the bean, 155; in the com- mon pea, 156; effect of moist air, 180; of killing or injuring the primary radicle, 186, 187; circumnutation of flower-steins, 225; epinasty, 268; movements of leaflets of Trifolium incar- natum, 350; action of light in modifying the periodic move- ments of leaves, 418; on gevtro- pism and helictropism, 426, n.; on Tropeolum majus, 458°

on the hypocotyls slightly helio- tropic, and stems strongly aphe- liotropic of the ivy, 453; he- liotropism of radicles, 482; ex- periments on tips of radicles of bean, 523, 524; curvature of the hypocotyl, 555 ; resemblance between plants and animals, Saxifraga sarmentosa, _ circum- nutation of an inclined stolon, Schrankia aculeata, nyctitropic movement of the pinnae, 381, —, lyponastic movement of the curved summit of the stem, 274- Stabl, Dr., on the effect of Aci- dium on shoot, 189; on the in- fluence of light on swarm-spores, 488, n.

Strasburger, on the effect of light on spores of Hematuceus, 455, n. ; the influence of light on the swarm-spores, 488 ; Strawberry, stolons of the, circum- nutate, but not affected by mode- rate light, 454 Strephium floribundum, circumnu- tation and nyctitropic movement of leaves, 391, 392 Tamarindus Indica, nyctitropic movement of leaflets, 374 Transversal - heliotropi-mus (of Frank) or diaheliotropism, 438 Trapa natans, unequal cotyledons, 95, n.

Trichosanthes anquina, action of the peg on the radicle, 104 —— globosum, with hairs protecting the seed-bearing flowers, 517 ——, circumnutating and epinastie movements of flower-stem, 276- —, circumnutation and nycti- tropic movements of terminal leaflets, 352, 353 —, circumnutation and _nycti- tropic movements of leaves, 350 Triticum vulgare, sensitiveness of tips of radicle to moist air, 184 Tropeolum majus (?), sensitiveness of apex of radicle to contact, 167 ——, circunmutation of stem, 204 ——, influence of illumination on

lateral light, 430 , stems of very young plants highly heliotropic, of old plants slightly apheliotropic, 453 , effect of lateral light, 484 —— minus (?), circumnutation of Vancher, on the burying of the flowcr-heads of Trifolium sub- terraneum, 513; on the protec- tion of seeds, 517 Vries, De, on turgescence, 2; on epinasty and hyponasty, 6, 267, 268; the protection of liypo- cotyls during winter, 557 ; stoluns apheliotropic, 108; the nycti- tropic movement of leaves, 283; the position of leaves influeuced by epinasty, their own weight and apogeotropism, 440; apo-eotro- pism in petioles and midribs, 443; the stolons of strawberries, 454 ; the joints or pulvini of the Gra- minex, 502

Wiesner, Prof., on the circumnuta- tion of the hypocotyl, 99, 100; on the hooked tip of climbing stems, 272; observations on the effect of bright sunshine vn chlorophyll in leaves, 446; the effects of an intermittent light, 457; on aérial roots, 486; on special adaptations, 490 Wilson, Mr. A. S., on the move ments of Swedish turnip leaves,