Again, as in making reciprocal crosses between the same two species, there is occasionally a great difference in the result, so the same thing occurs with trimorphic plants;
Gainera, kasu honetan, espezie biren artean elkarrekiko gurutzaketak egitean bezala, noizik behin alde handia gertatzen da emaitzan, eta gauza bera gertatzen da landare trimorfikoetan ere;