462 Small. — Pollen-presentation Mechanism in the Compositae. 
so-called tails, the auricles being mucronate ; type 9 is similar, but the 
auricles are connate and mucronate ; types io, 11, and 12 show stages in 
16 a 
Fig. 1. Types of Stamens in the Compositae (for explanation see text, pp. 461-4). 
the elongation of these tails, which remain simple and undivided ; in type 12 
the tails of the contiguous auricles are united ; types 13 and 14 show further 
