588 



INDEX. 



Qucrcus virens, manner of germina- 

 tion, 85, 557 



K. 



Radiation at night, effect of, on 

 leaves, 284-286 



Badicles, manner in which they 

 penetrate the ground, 69-77 ; cir- 

 cumnutation of, 69 ; experiments 

 with split sticks, 7-t ; with 

 wooden pincers, 75 ; sensitiveness 

 of apex to contact and other irri- 

 tants, 129 : of Vicia /aba, 132- 

 15S; 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, 540 ; protrusion 

 andcircumnntationina germina- 

 ting seed, 548; tip highly sen- 

 sitive, 550 ; the tip acts like the 

 brain of one of the lower animals, 

 573 



, secondary, sensitiveness of 



the tips in thebtan, 151 ; become 

 vertically geotropic, 186-191 



Ramey on tlie movements of the 

 cotyledons of Mimosa pudica, 

 nnddianthus Dampien at night, 

 297 



lianunculus Ftcaria, mode of 

 breaking through the ground, 

 86, 90 



, s-ingle cotyledon, 96 



, effect of lateral light, 484 



Itaphanus sativa, sensitiveness of 

 apex of radicle, 171 



, sleep of cotyledons, 301 



Rattan, Mr., on the germination of 

 the seeds of Megarrhiza Califor- 

 tiica, 82 



Relation between circumnutatiou 

 and heliotropism, 435 



Reseda odorata, hypocotjl of seed- 

 ling slightly heliotropic, 454 



Reversion, due to mutilation, 1 90 



lihipscilis cassytha, rudimentary op- 

 tyledons, 97 



llicinns Borboniensis, circumnuta- 

 tion of arched hypocotyl, 53 



RoMnia, effect of bright sunshine 

 on its leaves, 445 



pseudo-acacia, leaflets vcrtica' 



at night, 355 



Roclier, M., on the movements of 

 Ceratopkyllum demersum, 211 



Royer, Cli., on the sleep-movements 

 of plants. 281, n. ; on the slet-p of 

 leaves, 318 ; the leaves of Medi- 

 cago maculata, 345 ; on Wistaria 

 Sinensis, 354 



Eubus idaus (hybrid) eircumnuta- 

 tion of stem, 205 



, apogeotropic movement of 



stem, 498 



Ruiz and Pa von, on PurUeria hy- 

 grometrina, 336 



SACHS on " revolving nutation," 1 ; 

 intimate connection between tnr- 

 gescence and growth, 2, n. coty- 

 ledon of the onion, 59 ; adapta- 

 tion of root-hairs, 69 ; the move- 

 ment of the rad:ele, 70, 72, 73 ; 

 movement in the hypocotyls of 

 the bean, &c , 91 ; sensitiveness 

 of radicles. 131, 145, 198; sensi- 

 tiveness of tlic 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 ; movements 

 of leaflets of Trifolium incar- 

 natum, 350; action of light in 

 mo lifying the periodic move- 

 meius of leaves, 418 ; on geotro- 

 pism and helk'tropi-m, -l.'ii!, n : 

 ou jf'roj/ volum )iu'ju, 4^ ' 



