Lower stem leaves 1- or 2-pinnately compound, leaflets few. Middle lobe of lower corolla lip obcordate, margin crenulate, apex emarginate.

• 下部茎叶1或2羽状复叶，小叶很少。倒心形的下部花冠唇，边缘具细圆齿，先端微缺的中部裂片。