588 



INDEX. 



QUERCnS. 



Quercus virens, manner of germina- 

 tion, 85, 557 



B. 



Radiation at night, offout of, on 

 leaves, 284-28tJ 



Radicles, manner in which tliey 

 penetrate the ground, 69-77 ; cir- 

 oumnutation of, 69 ; experimenis 

 with split siiickB, 74 ; with 

 wooden pincers, 75 ; sensitiveneds 

 of apex to contact and other irri- 

 tants, 129 ; of Vicia faha, 132- 

 158; various experiments, 135- 

 140; summary of results, 148-151; 

 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, 540 ; protrusion 

 andoircumnutationina germina- 

 ting seed, 548; tip highly sen- 

 sitive, 550 ; the tip acts like the 

 braiu of one of the lower animals, 

 573 



■ , secondary, sensitiveness of 



the tips in the bean, 154; become 

 vertically geotiopic, 186-191 



Ramey on the movements of the 

 cotyledons of Mimosa pudica, 

 and Clianthus Dampieri at uisht, 

 297 



Ranunculus Ficaria, mode of 

 breaking through the gruund, 

 86,90 



, single cotyledon, 96 



, effect of lateral light, 484 



UapJianus sativa, sensitiveness of 

 apex of radicle, 171 



, sleep of cotyledons, 301 



Rattan, Mr., on the gc-rmination of 

 the seeds of Megarrliiza Califor- 

 nica, 82 



Relaiiou between circumiiutation 

 and heliotropism, 435 



SACHS. 



Jieseda ofjoraia, hypocotyl of seed- 

 ling slightly heliotropio, 454 



Reversion, due to mutilation, 190 



Rhipsalis cassyflia, rudimentary co- 

 tyledons, 97 



Bicinus Borhonient:s, oircumnula- 

 tion of arched liypocotyl, 53 



Edbinia, effect of bright sunshine 

 on its leaves, 445 



'■ pseudo-acacia, leaflets vertical 



at night, 355 



Rodier, M., on the movements of 

 Ceratnphyllum demerswn, 211 



Koyer, Ch., on the sleep-movements 

 of plants. 281, n. ; on the sleep of 

 li aves, 318 : the leaves of Medi- 

 cago maculata, 345 ; on Wistai-ia 

 Sinensis, 354 



liuhus idotus (hybrid) circumnuta- 

 tion of stem, 205 



, apogeotropic movement of 



stem, 498 



Euiz and Pavon, on Porlieria hy- 

 grometrina, 336 



3. 



Sachs on " revolving nutation," I ; 

 intimate connection between tur- 

 gesoence 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, &o., 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-stems, 

 225 ; epinasty, 268 ; moveraenu 

 of leaflets of Trifolium incar- 

 natum, 350; action of light in 

 modifying the peiiodio move- 

 ments of leaves, 418 ; on geotro- 

 pism and heliotropism, 436, «.; 

 ou Trap volum majus, 453 ■ 



