158 



Leverage, excessive distal, to which the petioles of 

 Mimosa pudica are exposed • .... 77 



, distal, action of, on diurnal position of the 



petiole in Mimosa pudica . • • • 81, 86 



increased by adherent water ■ . . 101 

 — as a cause of convergence of the secondary 



rachises in folly depressed leaves of Mimosa pu- 



die a ••••••••• jlo 



•, experiments on the effects of— Appendix A 



Lois, transpiratory, in plan s of Mimosa pudica • 77, 78 



M. 



Measurements of various portions of the primary 



pulvinus in Mimosapudica • . . • # 84 



of various portions of the secondary 



pnlvinus in Mimosa pudica . . • • • 88 

 ilimosapudica, nyctitropic movements of leaves of— • 52 



— > , positions of the various parts of the 



leaves of, at an early stage of development • . 52 



-, irritability of the diurnal position of 

 the petiole of, owing to distal leverage ... 52 



, structural facilities for the occurrence 

 of rapid filtrative losses in turgescence provided by 

 the pulvinar tissues of — 67 



, movements of— 76 

 ■, structural features of leaves of— . 76 

 ■, positions of very young leaves of — • 79 

 , movements of, not invariably sud- 

 denly executed # 87 



Motor organs, structural features of— ... 60 

 Movements, massive, causes of, in animal and vege- 

 table organisms • . 4 



, massive, causes of, in leaves # m 56 



, protoplasmic, apart from massive in 

 Selaginella serpens 43 



of rotation replacing elevation of the two 

 halves of the laminae of pinnse ... ,63 



of leaves, variations in the rates of— . 56 

 , variations in the rates of, in relation to 

 structural features in the motor organs # . 57 



, progress of, in the pinnae of Cassia 



alata 5g 



•, absence of, in very young and in old 



leaves of Cassia alata # g.> 



■, onset of, in Cassia alata ... 62 



, transitory character of, in Cassia suma- 



trana 63 



•.absence oF, in very young leaves of 



Cassia sumatrana g.j 



, absence of, in old leaves of Cassia suma- 

 trana .... o. 



60 



, slow rate of, in Cassia sumatrana in 



relation to the structure of tbe pulvinar tissues . . 66 



of leaves of Pithetolobium soman . . 67 



, relative rapidity and persistence of in 



Pithecootbium saman . om 



persistence of, in leaves of Leuccena 

 gfauca . 



.rates of, m relation to facilities for re- 

 distribution of liquids . . 7g 



INDEX. 



Movements, minor tendency to rapid and extensive, 



Mimosa 



89 



Mimosa 



93 



i 



by the same causes which give rise to movements 



in other nyctitropic leaves 



, exceptional character of> in Mimosa 



pudica ••••••••. 95 



• 95 



M\ 



• 9 characters of, in Neptunia oleracea • 



• not always sudden in the primary petiole 



-, conditions under which maximal, occur 



87 



in leaves of Mimosa pudica 



98 



Mimosa 



tions of saturation of the soil and air . • . 



, extent of, determined by conditions re- 

 gulating supply and loss of water 



98 



102 



pinnules of Mimosa 



influence of exposure to direct sunshine 



103 



Mimosa 



pudica under the influence of exposure to direct 



sunshine 



106 



, centrifugal propagation of, on localised 

 application of heat to mature axes of Mimosa 



pudica 



, limited extension of, in Mimosa pudica 



113 



when determined by mechanical stimulation . 



117 



— — , extension of, in Mimosa pudica after 

 rupture of the continuity of the tissues . 



• f extension of, in Mimosa pudica after 





117 



exposure to heat • •••«. 119 



, factors inductive of, in Mimosa pudica . 



i»: 



24 



N. 



Negative fluctuations in liquid pressure as causes of 

 the occurrence of movements in Mimosa pudica 



Neptunia oleracea, movements of leaves of 



Nocturnal position, 

 assamption of 



conditions determining the 



pudica 



assumption of, by leaves of Mimosa 



permanent one 



-, one of reversion to a previously 



petioles of Mimosa pudica 



extreme instability of, in the 



part of the night 



attainment of, during the firs 



~ . " 



Nyctitropic movements in protoplasts of Selaginella 



serpens 



suppression of, with 



in guard-cells of stomata 

 , causes of, in leaves . 

 ', modification and occasional 



t rates at which conducted 



O. 



Oranges, effects on the turgescence of, following ex 



posure to chloroform, &c. 

 Osmic : acid effects of, on the 'turgescence of the 



fertile filaments of Pilobolus crystalline . 



, effects of, on the leaves of Kalanchoe 



123 



95 



75 



78 



80 



80 



81 



41 

 45 

 46 



56 

 56 



27 



28 



laciniata 



33, 34 



