William Bateson,
Problems of Genetics
“ Where, however, no such sterility is met with, as for instance in the crosses made by E. Baur among the species of Antirrhinum there is every reason to think that the whole mass of differences can and will eventually be expressed in terms of ordinary Mendelian factors. Baur has for example crossed species so unlike as Antirrhinum majus and molle, forms differing from each other in almost every feature of organisation. [1] The F2 generation from this cross presents an amazingly motley array of types which might easily if met with in nature be described as many distinct species. ”
