CONTENTS. 
—o 
CHAPTER I. 
TwInInc 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—Rate of revolu- 
tion in various plants — Thickness of the support round 
which plants can twine—Species which revolve in an anoma- 
lous manner Pry ee ee ee Pages 144 
CHAPTER II. 
LEAF-CLIMBERS. 
Plants which climb by the aid of spontaneously revolving and 
sensitive petioles— Clematis— Tropceeolum—Maurandia, flower- 
peduncles moving spontaneously and sensitive to a touch— 
Rhodochiton—Lophospermum, internodes sensitive—Solanum, 
thickening of the clasped petioles — Fumaria — Adlumia— 
Plants which climb by the aid of their produced midribs— 
Gloriosa — Flagellaria — Nepenthes — Summary on _leaf- 
Climbers .. 0 6. ee ee wee ete wee 48-83 
CHAPTER III. 
TENDRIL-BEARERS. 
Nature of tendrils—BIcNoNIAOGEZ, 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 
— PoLEMONIACEE — Cobea scandens, much branched and 
