Since this is a Sam Este's plant, we're doing this his style: Guess that plant! (Three strikes and you're out!)
Hint #1: There are five species in this hybrid. N. ( ___ x ___ ) x ( ___ x ( ___ x ___ ))
Hint #2: There are three highlanders and two lowlanders. (That's going by altitude.)
Hint #3: No species are repeated in this cross.
(If this bad pic isn't enough, then I'll take more. )