MASS MUTATIONS AND TWIN HYBRIDS OF 0. 

 GRANDIFLORA AIT. 



Fig. 3. O. grandi flora mut. gigas, August 1915; flowering spike for 

 comparison with fig. 1; a, opening flower hud of O. mut. gigas; b, flower of 

 O. grandiflora, deprived of petals, for comparison with flower on spike of 

 mut. gigas; c, opening flower bud of O. grandiflora; d, f, buds for next day's 

 flowers of O. mut. gigas; e, same of O. mut. grandiflora 



