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

植株25-50厘米，一次结果，全株毛。

Stem straight, glabrous, muricate near nodes.

茎直，毛，粗糙近节。

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

嫩茎圆柱状到经常地或似，毛，被微柔毛，短柔毛，或被绒毛，通常后脱落。

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

灌木或小乔木，通常直立，很少倾斜或攀援，毛，很少短柔毛，枝经常刺。

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，白色，粉红色，或红色，毛或有毛，边全缘，很少啮蚀状。