A showy houseplant is a type of plant that is known for its bright colors and attractive foliage. The three crossword solutions for this term are BEGONIA (7 letters), CALLA (5 letters), and Coleus (6 letters). BEGONIA is a genus of flowering plants in the family Begoniaceae, which includes over 1, 400 species. CALLA is a genus of flowering plants in the family Araceae, which includes six species. Coleus is a genus of flowering plants in the family Lamiaceae, which includes over 150 species.