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POPULAR SCIENCE REVIEW. 
Fig. 19. Flower of oak-leafed Pelargonium, to show the position of the 
stamens before fertilization. The style and stigmas immature. 
Fig. 20. The same, with filaments reflexed after fertilization ; the anthers 
have fallen. The stigmas are now in the position of the anthers. 
Fig. 21. Flower of Teucrium Scorodonia, to show the position of the stamens 
before fertilization. 
Fig. 22. Same, after fertilization, the stamens having retired, while the 
stigmas now occupy their position. 
