Small, — Pollen-presentation Mechanism in the Compositae. 463 
elaboration of these appendages, the former being branched and the latter 
more or less lacerate or fringed with hairs ; type 15 is similar to 14, but the 
tails of contiguous anthers are united. Type 16 includes two forms of 
Fig. 2. Types of Styles in the Compositae (for explanation see text, pp. 464-5). 
lacerate or more or less elaborate tails; the first form has the adjoining 
tails free and the other has them united ; both these forms occur in many 
genera of the Cynareae. Fig. 7 represents an example of this type which 
should be compared with the forms shown in Figs. 3-6. As a final stage in 
