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flower is eut, the ovary proving tu be of especial impor- 

 tance. With Tulipa Gesneriana it is chiefly the perianth 

 that rules the longitudinal growth of the upper internode ; 

 with Crocus vernus, finally, the growth of corolline tube, 

 stamens and style is in a high degree independent ofthe 

 présence of petal lobes as well as of anthers and stigmas. 



