The inflorescence is terminal, elongated, up to half or one-third the length of the stem, with small bract-like bracts.
It is a perennial herb, growing to about 15-40 cm tall, sometimes taller.
The flowers have a long pedicel, a tubular calyx with three teeth, and a corolla 11-15 mm long, white or pale yellow with a darker purple or reddish-purple helmet.
白色、淡黄色、紫色、紫红色