In fact, this area is the only place in the world where three poplar species hybridize.

The two species remain mutually fertile, and occasionally hybridize where their ranges overlap.

In spite of this, these species can still hybridize and produce fertile offspring.

This species readily hybridizes with many other species of Potamogeton.

Various species hybridize easily between them and hybrid plants are difficult to identify.

Different species readily hybridize with each other and are very difficult to distinguish.

Different species hybridize easily, and this has been used in the development of the wide range of garden roses.

Several species easily hybridize with each other as well, making identification difficult.

This species sometimes hybridizes with Dudleya edulis in the one area where they occur together.

This species readily hybridizes with several other species of willow.