MASS MUTATIONS AND TWIN HYBRIDS OF 0. 

 GRANDIFLORA All 



Fig. 5. O. grandiflora X O. Lamarckiana mut. nanella: branches of triple 



hybrids shortly before flowering; O. ovata (about 50 per cent); L. lutea, and 



B. brunnea (each about 25 per cent of offspring) 



