PLATE XV. 



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

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

 upper part of stem, buds, and flowers. 



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

 No. 2.27 at right. 



