THE ANGIOSPERMAE 



1345 



greatly while the flower is still in bud. The enlarged stigma is pushed up 

 between the epipetalous anthers and carries with it the greater part of the 

 pollen. It then presses hard against the dome formed by the closed petals. 

 The style is now in a state of high compression and if the flower is touched 

 the petals separate and the style springs out to about double its former 

 length, striking the insect and forcibly scattering a cloud of pollen at the 

 same time. Later, the receptive lobes of the stigma separate and are ready 

 to take the pollen from subsequent visitors. 



(e) Deceptive Flowers 



This class is probably considerably larger than is appreciated at the 

 present time, for the details of many pollination mechanisms remain to be 

 studied. Flowers which are collectively referred to as deceptive agree in 



B 



Fig. 1255. — Parnossio pahistris. A, Flowering shoot. B, C and D, Suc- 

 cessive stages of flower showing ripening of incurved stamens and 

 finally, after shedding of the anthers, their outcurving to expose 

 the ripened stigma. 



