Which term was used by mendel in the observations of pea plants

Gregor Mendel developed the model of heredity that now bears his name by experiments on various charactersitics of pea plants: height (tall vs. Short); seed color (yellow vs. Green); seat coat (smooth vs. wrinkled), etc. The following explanation uses the tall/short trait ... these F2 plants breed true.

I'm not sure this is right but hybridization is the term.