PLATE XV. 



Fig. i. Adult plant of 2.1 of the hybrid Onagra lainarckiana X Onagra 

 biennis, showing basal rosette, pathological 'leaves, normal leaves on 

 upper part of stem, buds, and flowers. 



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Fig. 2. Onagra lamarckiana X Onagra biennis No. 2.24 at left, 



No. 2.27 at right. 



