HYBRIDIZABLE
Etymology
Adjective
hybridizable
That which may be hybridized.
Source: Wiktionary
Hy"brid*i`za*ble, a.
Definition: 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.
Hybridizable genera are rarer than is generally supposed, even in
gardens where they are so often operated upon, under circumstances
most favorable to the production of hybrids. J. D. Hooker.
Source: Webster’s Unabridged Dictionary 1913 Edition