1903 W. Bateson in 2 76 Purple flowers in Sweet-Pea [may be produced] by crossing white ‘Emily Henderson’ round-pollened form with the long-pollened form of the very same white variety.
1957 L. H. Snyder & P. R. David (ed. 5) x. 139 The F1 were crossed to redflowered round-pollened plants.