1.Plant 25–50 cm, monocarpic, glabrous throughout.Caudex simple.

1.植株25-50厘米，一次结果，全株无毛。

2.Stem straight, glabrous, muricate near nodes.

2.茎直，无毛，粗糙的近的节。

3.Young stems terete to frequently 4-angled or subalate, glabrous, puberulous, pubescent, or tomentose, often glabrescent.

3.嫩茎圆柱状到经常地略似翼的，无毛，被微毛，短毛，被绒毛的，通常后脱落。

4.Shrubs or small trees, usually erect, rarely viny or climbing, glabrous, rarely pubsecent, branches often inermous.

4.灌乔，通常直立，很少倾斜攀援的，无毛，很少短毛，枝经常无刺。

5.Petals usually 5, rarely more, occasionally absent, white, pink, or red, glabrous or hairy, margin entire, rarely premorse.

5.花瓣通常5，很少更多，偶尔无，白色，粉红色，红色，无毛有毛，边全缘，很少啮蚀状。

6.Shrubs evergreen or sometimes semievergreen; branchlets and pedicels not setose. Leaf blade adaxially glabrous; corolla creamy yellow, lined and flushed rose on outside. Fl. May–Jun.

6.有时的常绿灌半常绿；枝和花梗不具刚毛。叶片正面无毛；在外面上的花冠米黄色，线和带玫瑰色；花期5月6月。