352 INDEX. 



K. 



Knaurs, propagation by, 189. 



L. 



Latex, its destruction by frost, 85. 



Layering, Chinese mode of, 209. 



Layers, propagation by, 207. 



Leaf, an expansion of the bark, 37. 



Leaf-buds, their reproductive properties different from that of seeds, 

 7 — locality of their formation, 30 — adventitious, 31 — their pro- 

 perties, 30 — their formation on stems, 30 — their importance, 32 

 — the parents of wood, 30. 



Leaf-buds, their presence universal, either latent or developed, in 

 the axils of leaves, 37 — instances of their formation on leaves, 56 

 — their identity with blossom-buds in the first stage of organi- 

 sation, 62 — -on cuttings, 196, 204. 



Leaves give origin to woody tissue, 23 — their action, 37 — attraction 

 of, causes the flow of sap, 36 — their nature, 37, 41 — their modi- 

 fications have leaf-buds in their axils, 37 — have universally 

 leaf-buds, either latent or developed in their axils, 37 — their 

 epidermis, 38 — number of stomates on the surface of, in various 

 species, 39 — particular offices of, 40 — their free action essential 

 to the health of plants, 40 — their action reciprocal with that of 

 the roots, 49 — their absorption of moisture from the air, 50 — 

 their action forms the peculiar secretions of plants, 61 — their 

 colour influenced by light, 62 — period at which they cease to 

 decompose carbonic aoid, 54 — ultimately become incapable of 

 performing their functions, 54 — are organs of digestion and 

 respiration, 64 — their temporary nature, 64 — instances of leaf- 

 buds being formed on them, 55 — modified, constitute the parts 

 of flowers, 62 — their physiological action analogous to that of 

 the fruit, 71 — their functions strengthened by the early removal 

 of the fructification, 76 — propagation by, 189 — conditions most 

 favourable for propagation by, 195 — their action forms roots, 

 195 — of evergreens, 286. 



Liber, its consistence, 24 — its situation, 26 — the internal part of the 

 b.ark, 20 —offices performed by the, 32 — its importance, 33. 



Ligatures for buds, 215 — objects of their application with regard to 

 the fertility of Ueea, 256. 



