CLASSIFICA TION. 39 



B. Pollen powdery, granular, or sectile. 



a. Anther terminal, erect. 



TRIBE IV. OPHRE^E, OR OPHRYDE^E. 



b. Anther terminal, opercular. 



TRIBE V. ARETHUSE^E. 



c. Anther dorsal. 



TRIBE VI. NEOTTEJE. 



II. Anthers two. 



TRIBE VII. CYPRIPEDE.E. 



From this general view of the classification of Dr. 

 Lindley, any cultivator can easily ascertain to which of 

 the tribes any Orchid which may bloom in his collection 

 belongs. 



Each of these tribes subdivides itself into a greater or 

 less number of species, the determination of each of 

 which demands a special study of individual peculiari- 

 ties. 



The geographical distribution of these different tribes 

 is interesting as illustrating the remarks in former chap- 

 ters. 



By reference to the following table we shall see that 

 the greater proportion of the tribes Vandecz and Epiden- 

 dretz are found in the Indian Archipelago and in tropical 

 America ; it is in these two tribes, we must remember, 

 that the Epiphytal Orchids mostly range themselves ; the 

 European and North American species being confined to 

 three in the former tribe, and two in the latter. On the 

 other hand, the terrestrial species, which are mostly found 

 in the tribes Ophrea, Arethusea, and Neottece, are sparsely 

 represented in the Indian Archipelago and tropical 



