hybridizable

from The Century Dictionary.

• Capable of hybridizing or of being hybridized; able to produce hybrid offspring by crossing with another species. Also spelled hybridisable.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Capable of forming a hybrid, or of being subjected to a hybridizing process; capable of producing a hybrid by union with another species or stock.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective That which may be hybridized.