Syagrus romanzoffiana - The queen palm is a popular feather-leaved palm with graceful arching leaves. It is one of the hardiest of the tropical-looking palms, being suitable for planting in USDA plant hardiness zone 9B (>25°F). Queen palms are considered to be moderately tolerant of salt spray. They can reach heights up to 50 ft with a spread of 20–25 ft. The smooth gray trunk varies from 8–15 inches in diameter, depending on the seed source and environment, and may contain bulges. Large inflorescences of cream-colored flowers are produced from within the leaves in the canopy during the spring and summer months.