between objects attached on opposite sides--Tips of secondary radicles
sensitive--Pisum, tips of radicles sensitive--Effects of such sensitiveness
in overcoming geotropism--Secondary radicles--Phaseolus, tips of radicles
hardly sensitive to contact, but highly sensitive to caustic and to the
removal of a slice--Tropaeolum--Gossypium--Cucurbita--Raphanus--Aesculus,
tip not sensitive to slight contact, highly sensitive to caustic--Quercus,
tip highly sensitive to contact--Power of discrimination--Zea, tip highly
sensitive, secondary radicles--Sensitiveness of radicles to moist air--
Summary of chapter...129-200


CHAPTER IV.

THE CIRCUMNUTATING MOVEMENTS OF THE SEVERAL PARTS OF MATURE PLANTS.

Circumnutation of stems: concluding remarks on--Circumnutation of stolons:
aid thus afforded in winding amongst the stems of surrounding plants--
Circumnutation of flower-stems--Circumnutation of Dicotyledonous leaves--
Singular oscillatory movement of leaves of Dionaea--Leaves of Cannabis sink
at night--Leaves of Gymnosperms--Of Monocotyledons--Cryptogams--Concluding
remarks on the circumnutation of leaves; generally rise in the evening and
sink in the morning...201-262
[page vii.]


CHAPTER V.

MODIFIED CIRCUMNUTATION: CLIMBING PLANTS; EPINASTIC AND HYPONASTIC
MOVEMENTS.