49 



Ipomoea purpurea. Summary of Measurements (in Inches) 

 of the Ten Générations. ') 



1) Man vergleiche : Darwin. The efifects of Cross- und Self-Fertilisation in the 

 vegetable Kingdom. Second édition. Chapt. II, p. 52. 



Recueil des trav. bot. Néerl. Vol. IV. 1907. 4 



