A hybrid. An (esp. interspecific) hybrid plant. Frequently attributive. Now rare.

A hybrid produced by the crossing of plants of two different genera.

attributive and in other combinations (in sense 3), as graft-growth, graft surface, graft theory; graft-hybrid n. (see quot.). graft-hybridism n.…

Any member of a group of different hybrid forms produced by crosses between the same two parent species.

a cross made by planting two or more mutually fertile varieties together and allowing free natural cross-pollination; frequently attributive.

In extended use. A hybrid between two varieties of grapevine.