Bibb lettuce has a similar taste to butter lettuce, though slightly sweeter and more buttery. This compact butter head lettuce features pale to medium green leaves, with cupped leaves serving well for wraps or bowls. Bibb lettuce is also known as limestone lettuce or Boston Bibb. Butter lettuces like Bibb are lighter in color than romaine, green or red leaf lettuces, and have a milder flavor. The leaves themselves are very delicate and tender: the name butter comes from the texture, not the flavor.