in the light of the Cold Spring Harbor and Louvain studies of Oenothera, certain theories and conclusions which Gates has advanced from time to time and which Gates and Miss Thomas have based upon the ...

Oenothera grandiflora Aiton from Castleberry ... grandiflora yields twin hybrids with the same species which produce twins in their combinations with O. Lamarckiana. The female organs of O. biennis, O ...