CONTENTS. ^'' 



CHAPTER V. 



Modified Ciecumnutation : Cumbikg Plants; Epinastio and 

 Hyponastic Muvements. 



Oilcumautation modified through innate causes or through the notion 

 of external conditions — Innate causes — Chmbing plants ; simi- 

 larity of their movements with those of ordinary fjlants; in- 

 creased am|ilitude ; occasional points of difference — Epinastio 

 growth of young leaves — Hyponastic growth of the hypoootyls 

 and epicotyls of seedlings — Hooked tips of climbing and other 

 plants due to modified circumnutation — Ampelopsis tricuspidata 

 — Smithia Plundii — Straightening of the tip due to liyponasty — 

 Epinastic growth and circumnutation of the flower-pedancles of 

 Trifolium repeus and Oxalis carnosa Page 203-279 



CHAPTER VI. 



Modified Circumnutation: Sleep or Nyctitropio Move.ments, 

 THEiB Use: Sleep of Cotyledons. 



Preliminary sketch of the sleep or nyctitropio movements of leaves 

 — Presence of pnlvini — The lessening of radiation the final cause 

 of nictritropio movements— Manner of trying experiments on 

 leaves of Oxalis, Arachis, Cassia, Melilotus, Lotus and Marsilea, 

 and on the cotyledons of Mimosa — Concluding remarks on I'adia- 

 tion from leaves — Small differences in the conditions make a 

 great difference in the result — Dcsciiption of the nyctitropio 

 position and movements of the cot\ ledons of various plants — 

 List of species — Concluding remarks — Independence of the 

 nyctitropio movements of the leaves and cotyledons of the same 

 species — Reasons for believing that the movements have been 

 acquired for a special purpose 280-316 



CHAPTER VII. 



Modified Ciucumnutation : Ntotitropic ok Sleep Movements 

 OF Leaves. 



Conditions necessary for these movements — List of Genera and 

 Families, which include sleeping plants — Description of tho 

 movements in the several Genera — Oxalis: leaflets folded at 



