glabrous

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

嫩茎圆柱状到常地四棱形略似翼，无毛，被微柔毛，短柔毛，被绒毛，通常后脱落。

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

植株25-50厘米，一次结果，全株无毛。

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

灌乔，通常直立，很少倾斜攀援，无毛，很少短柔毛，枝常无刺。

Stem straight, glabrous, muricate near nodes.

茎直，无毛，粗糙近节。

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

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。

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.

有时常绿灌半常绿；枝和花梗不具刚毛。叶片正面无毛；在外面上花冠米黄色，线形和带玫瑰色；花期5月6月。