 The calyx is usually purple-flecked, and the five lobes are 3 to 5 millimeters long.The corolla is 10 to 20 millimeters long, the 5 lobes swept backwards, purplish-lavender, seldom white, the short tube yellowish, usually with a purplish wavy line at the base.The filaments are joined into a yellowish tube 1.5–3 mm long, which is smooth or only slightly wrinkled.