Interspecific Hybrid 
This is a cross between plants from two species (within the same genus), for example, Spartina alterniflora and Spartina maritima = Spartina x townsendii (Townsend's Cord-Grass), which is a sterile hybrid.
Interspecific Hybrid
This is a cross between plants from two species (within the same genus), for example, Spartina alterniflora and Spartina maritima = Spartina x townsendii (Townsend's Cord-Grass), which is a sterile hybrid.