THE DEHISCENCE OF ANTHERS BY APICAL PORES. 



181 



Theaceae. 



With Tremanthera (1 species in New Guinea), 

 apically dehiscent genus of the Theaceae, I am 

 ciently acquainted, but the indefinite number of 



with 



Ions-ovate anthers would indicate that it should be 



placed in this class. 



Bixaceae. 



In the Bixaceae, Bixa (1 species of tropical America, 

 now widely distributed in the tropics) is a unique form 

 characterized by its numerous, horse-shoe shaped anthers 



It may most conveniently be placed in 

 this type. The other two apically dehiscent genera will be 

 treated under the Melastomataceous type. 



on long filaments. 



VI. SOLANUM-CASSIA TYPE. 



Perianth usually quite large, mostly actinomorphic, seg- 



°flexed 



members 



m 



as reduced members of these numbers in zj'gomorphic 

 forms or more rarely from a multi-staminate androecium ; 

 filaments much reduced in length; anthers basi fixed, oblong 

 to sagittate or linear, often more or less connivent around 



filiform 



o 



or at least erect, very rarely distant; flowers generally 

 conspicuous and highly colored. 



This is the type upon which my interest has been for 

 the most part centered. It shows a great uniformity of 

 character and in this lie its especial interest and impor- 

 tance as a source of data towards the solution of the prob- 

 lem of the influence of insects upon the fo 

 and the geographical distribution of different floral types. 

 In view of this fact, the treatment of this class is more 

 detailed than that of the others. 



As I have insisted above, the distinction between dehis- 

 cence by pores and by longitudinal slits, and between the 



m 



. % 



