The two crossword solutions for the term PALM (GENUS) are ARECA (5 letters) and NIPA (4 letters). The genus of palm trees, known as Arecaceae, is a large family of flowering plants that includes over 2, 600 species. ARECA is a genus of palms native to tropical and subtropical regions of the world, with the majority of species found in Asia. NIPA is a genus of palms native to tropical regions of the Americas, with the majority of species found in South America.