CONTENTS. 



CHAPTER I. 



TwnrorG Plants. 



Introductory remarks — Description of the twining of the Hop 

 — Torsion of the stems — ^Nature of the revolving movement 

 and manner of ascent — Stems not irritable — Bate of revolu- 

 tion in various plants — Thickness of the support round 

 which plants can twine — Species which revolve in an anoma- 

 lous manner Pages 1-44 



CHAPTER II. 



Leap-Climbeeb. 



Plants which climb by the aid of spontaneously revolving and 

 sensitive petioles — Clematis — Tropceolwm — Maurandia, flower- 

 peduncles moving spontaneously and sensitive to a touch — 

 Hhodochiton — l.ophospermv/m, intemodes sensitive — SdUtnum, 

 thickening of the clasped petioles — Fumaria — Adlumia — 

 Plants which climb by the aid of their produced midribs — 

 Qloriosa — Flagellaria — Nepenthes — Summary on leaf- 

 climbers 45-83 



CHAPTER III. 



Tbndbil-Beaeebs. 



Nature of tendrils — Bignomiaob^, various species of, and their 

 different modes of climbing — Tendrils which avoid the light, 

 and creep into crevices — Development of adhesive discs — 

 Excellent adaptations for seizing different kinds of supports 

 — PoLEMONiACEiB — Cobcea scandens, much branched and 



