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A TEXTBOOK OF THEORETICAL BOTANY 



Fig. 1723. — Distribution of Tropaeolum. 



Fig. 1724. — Tropaeolum uiajiis. A, Younger flower, stamens extruded. 

 B, Older flower with stigma extruded. The stamens enlarge in 

 succession, to occupy the centre of the flower. When all are 

 exhausted they bend aside and the stigma comes forward into 

 the centre. 



I 



