Syngameon

Syngameon refers to groups of taxa that frequently engage in natural hybridization and lack strong reproductive barriers that prevent interbreeding.

[3] The term syngameon comes from the root word syngamy coined by Edward Bagnall Poulton to define groups that freely interbreed.

[5] A more specific definition of syngameon has been given to groups of taxa that frequently engage in natural hybridization and lack strong morphological differences that could be used to define them.

[1] Variation among species within a syngameon can be due to a number of factors related to their biogeography, ecology, phylogeny, reproductive biology, and genetics.

[1] Coenospecies, first coined by Göte Turesson in 1922,[7] refers to the total sum of possible combinations in a genotype compound, which includes hybridization that occurs both naturally and artificially.

Pattern of hybridization in the Pacific iris syngameon. Solid lines indicate natural hybridization is common. Dashed lines indicate that natural hybridization is rare. Iris thompsonii is a hybrid species. [ 1 ]
Relationship of coenospecies to ecospecies, ecotype, and ecophene [ 5 ]