314 VEGETABLE ORGANOGRAPHY. 



developed in preference, such as the axils of the 

 appendicular organs and the extremities of the fibres of 

 their limbs (Book iii. Ch. 1, 5). 



26th. The germs which are placed in the axils of the 

 appendicular organs, along the stem or petiole, may be 

 developed by the action of the nutritive forces alone. 

 Those which are situated at the extremity of the lateral 

 fibres of the limb almost always require (except in 

 Bryophyllum), in order to be developed, a particular 

 operation called Fecundation (Book iii. Ch. 5). 



27th. The germs which are developed without fecun- 

 dation most frequently arise united to the mother plant 

 without having proper envelopes, and without shooting 

 out roots : they then form branches. Some separate 

 when they are furnished with a tubercule or store of 

 nutriment : they then form separate individuals and 

 produce roots (Book iii. Ch. 5). 



28th. Every stem or branch can shoot out adventitious 

 roots. In Dicotyledonous trees, these spring from the 

 lenticels ; every branch, furnished with them or capable 

 of producing them, may easily be separated from the 

 mother plant and form a distinct being (Book iii. Ch. 5), 



29th. The germs which are developed by fecundation 

 are always contained in a closed envelope, furnished 

 with the rudiments of a root and appendicular organs. 

 They receive the name of Embryos (Book iii. Ch. 4). 



30th. The unfecundated germs perpetuate the varieties 

 of the mother plant; the embryos only retain the 

 characters of races or species. 



31st. The appendicular organs which immediately 

 surround the flowers, or the bracts, hardly ever have 

 leaf-buds developed in their axils ; this is still more 

 seldom the case in the appendicular organs which com- 

 pose the flowers (Book iii. Ch. 1 , 2). 



32d. The buds, or germs, which are developed into 



