Ch. Ill, SI 



FOR.Ms OF foliage: leaves 



71 



A very remarkable form of leaf occurs in the Welicitschia 

 niirnhilis of Southwest Africa, a plant unique in a great many 





>\'^- 



^ 



S*-^ 



ii:i^^— -^ ^ 



^^ 



I I 4J — n / I I I I r \ 1 1" 1 1 he 1l (.rr jl Kjla- 



hari. Africa. The woody tninL, though man\' years old. is but two feet in 

 height. (From Kerner.J 



features (Fig. 4:2 k The leaves, only two in number, grow 

 at their bases as they die at their tips throughout the long 

 life of the plant. 



Leaves are pro- 

 duced in buds, but 

 produce buds in very 

 few cases. The leaves 

 of some kinds of Be- 

 gonia, however, if cut 

 across the veins, de- 

 velop buds which 

 grow into normal new 

 plants ; and gardeners 

 are accustomed to 

 propagate those Be- 

 gonias in that way. In 

 the well-kiio^\Ti Life 

 Plant (BryopJvjUum), 

 the rather thick fleshy leaves regularly produce buds at the 

 outer ends of the veins fFig. 43) ; and these buds develop 

 freelv into young plants when the leaves fall on damp soil, 



Fig. 43. — The Life Plant (Bryophyllum 

 calycinum), developing young plants on the 

 margin of the leaves ; X \. (From Kerner.j 



