Can Carnivorous Plants Hybridize Across Genera? Exploring Crosses Between Dionaea, Drosera, and More

Hybridization among carnivorous plants is a topic of frequent curiosity. While some crosses are possible, they are limited by genetic relatedness. Here's what's known about intergeneric hybrids in cultivation.

Possible Hybrids

• Dionaea × Drosera: Crosses between Venus flytraps and sundews are theoretically possible, primarily with Drosera regia (king sundew), as these two genera share the closest ancestry within the Droseraceae family.
• Pinguicula × Utricularia: Some butterwort and bladderwort species are closely related enough (both in Lentibulariaceae) to potentially hybridize.

Unlikely or Impossible Crosses

• Sarracenia, Nepenthes, Cephalotus: These genera are only distantly related, having evolved similar trapping mechanisms independently (convergent evolution). They are too genetically divergent for hybridization.
• Carnivorous × Non-carnivorous plants: No known genetic relationships are close enough to allow hybridization between carnivorous plants and non-carnivorous species (e.g., Venus flytrap × cactus).

While Dionaea × Drosera regia hybrids have been discussed in horticultural circles, they remain extremely rare and challenging to produce. Most carnivorous plant hybrids occur within the same genus (e.g., Sarracenia hybrids, Nepenthes hybrids).