The term 'Mexican Plant' can be broken down into four crossword solutions: DAHLIA (6 letters), CHIA (4 letters), Tuberose (8 letters), and Jalap (5 letters). DAHLIA is a genus of bushy, tuberous, herbaceous perennial plants native to Mexico. CHIA is an edible seed native to Mexico and Guatemala that is used in many Mexican dishes. Tuberose is a fragrant flower native to Mexico and Central America. Jalap is a medicinal plant native to Mexico and Central America that is used to treat constipation.