'4 



COXTKXTS 



CllAITKR III. 

 'I'kiU': Stkms . . ... -73 



Expansion of liark- Shfildinj; I lark — Repairing injury — 

 K])i(lcrniis — l-'ihro-vascular bundles. 



CIlAl'TKK l\. 



Lkavks . . . . . -97 



A leaf a digestive organ — Petiole and blade venation 

 — Monocotyledons — Dicotyledons — Radical leaves — 

 Pliyllotaxis — Epidermis — Stomata — Influence of foliage 

 upon climate — Eucalyptus — Mesophyll — Chlorophyllon — 

 I'allisade tissue — Protoplasm — Absorption of carbon- 

 dioxide — Jewel-weed — Alcheniilla — (Irowing wheat — 

 Vertical leaves of eucalyptus cork layer — Fall of the leaf 

 — Useful products of trees. 



CHAITKK \'. 



lilMis ...... 



Buds formed in summer — lidllnw stalks of plane-tree — 

 Terminal and axillary l)uds — Spiral arrangement — Pollard 

 willow — Suckers — Dormant buds — Bulbils on lily stem 

 — Protection from cold — Leaf and flower buds — Folding 

 of embryo leaves and flowers. 



CHAPTER \T. 



Fl.OVVKRS ...... 



Floral envelopes — Buttercup — Gamopetalous — Poly- 

 petalous — Epipetalous — Apocarpous — Woodsorrel — 

 Syncarpous pistil— Geranium-coloured bracts — Composite 

 flowers — Fading flowers — Flower expansion •— Flower 

 dis.section— Cruciferous plant.s — Papilionaceous flowers — 

 Honey glands — F^ntomophilous flowers — Catkins — 

 Moniecious and dicecious flowers — Arum — Protection 

 from insects and moisture. 



123 



149 



