PLATE 9. 



Oenothcr:i :unini)pliila with liud-sport. Tin- n;iri-(>\v.lc:ivi-d lUriiinlu-nt stock represents the typic:il parent, 

 uliile the inrire vigorous u]iri>;lit l>ianrli uilh broader leaves is the mutant branch which represents 

 Oenothera biennis. 



