POLLiyATIOif AND FECUNDATION. 



49 



is furnished by the Fig-wort {Scrophularia). The flowers are 

 visited by bees for the nectar, which is secreted by glands at 

 the bottom of the corolla. The lower lobe of the irregular 

 corolla serves as a landing-place for the bees. The mature 

 pistil projects (Fig. 69) when the flower first opens ; and pol- 

 lination now takes place, the pollen coming from another 

 flower of the same sort. The position 

 of the unripe stamens at this time is not '% 

 seen, for the filaments are curved and the '' 

 unripe anthers are deep down in the co- 

 rolla. A day or two later, the anthers, 

 now mature, appear at the mouth of the 

 corolla (Fig. 70). By this time the stigma 

 previously pollinated is no longer in a 

 receptive condition, and lies half- withered on the lower petal. 

 Bees visiting the flower, would come in contact with the an- 

 thers, and the pollen grains that adhered to them would be 

 carried to the next Fig-wort {Scrophidaria) visited by them. 

 The pistil, if ripe, would retain some of the grains, and pol- 

 lination would thus be accomplished. 



7. As an example of a proterandrous flower, may be 

 mentioned "Clerodendron thompsoniae," a verbenaceous, tropical 



Fig. 69. 



Fig. 70. 



African climber, now common in conservatories. The adapta- 

 tions in this flower are exquisite. The crimson corolla and 

 bright, white calj'x in combination, are very conspicuous. The 

 4 E 



