FERTILITY IX CICHORIUM 1MV15US 



377 



Fig. I. Typical plants of the variety red-leaved Treviso. The marker stands 

 by self-fertile plant (R. Sen lo, No. 8); all other plants in the view were self-sterile. 

 From photograph taken in the afternoon when all flower heads are closed. 



involving duplication and cohesion of the main axis. Two main stems 

 develop with a single root system. Occasionally these are separated 



