ON BUDS 



19 



applies to Dandelions or Plantains. The natural 

 adventive buds appear on definite parts of the plant, 

 according to the species ; in accidental adventive buds 

 the place of origin depends on that of the injury. 



FIG. 21. ACHIMENES HAAGEANA, showing development of a new 

 flowering plant consisting of root and flowering-shoot. 



Adventitive shoots may arise, like normal shoots, 

 exogenously ; but endogenous development generally 

 occurs when they arise from older parts of stems or 

 roots. In some cases they are formed by the direct con- 

 version of the growing-point of a root, as in Bird's Nest 

 Orchid (Neottia Nidus- Avis), Catasetum tridentatum, &c. 



c2 



