248 



PHYSIOLOGICAL BOTANY. 



1. Elm 



2. Cypress 



3. Cheirostemon 



4. Ivy 



5. Larch 



6. Orange - 



7. Olive 



8. Oriental plane 

 9- Cedar 



JO. Lime 

 1 I . ( )ak - 

 J2. Yew 

 IS. Baobab 

 14. Taxodium 



Years. 



335. 



350 (about). 



400 (about). 



450. 



576. 



630. 



700 (about). 



720 (and upwards). 



800 (about). 

 10761117. 



81010801500. 

 1214145825882820. 

 51. ">0 (in 1757). 

 4000 to 6000 (about). 



CHAP. V. 



FUNCTION OP REPRODUCTION Periods 1, 2, 3. 



PROPAGATION (243.). ORIGIN OF FLOWER-BUDS (245.). 



FLOWERING (246.). FUNCTIONS OF THE PERIANTH ('252.). 



DEVELOPMENT OF CALORIC (254.). FERTILISATION 



(255.). FORMATION OF POLLEN (261.). MATURATION 



(265.). FLAVOUR AND COLOUR OF FRUIT (273.). 



(243.) Propagation. THERE are two distinct modes, 

 according to which the propagation of the vegetable species 

 is naturally secured, viz. " subdivision" and "reproduc- 

 tion." In the first the individual plant may be subdivided 

 into several parts, each of which when detached from the 

 parent stock is capable of existing as a separate individual. 

 A familiar example of this mode of propagation may 

 be seen in the common strawberry, to which we have 

 alluded in art. 237. It is very common to find elms, 

 poplars, and other trees throwing up suckers from their 



