. Leaves alternate; sessile or short-stalked due to sudden narrowing; leaf blade obovate or spatulate, leaves alternate, obovate or spatulate, 1-3cm long, 0.7-1cm wide, apex retuse, margin serrulate above middle, sessile. The base is cuneate, dark green or gray-green on both sides, sparsely long hairy, the lower leaves are small and gradually fall off after flowering.