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

1.嫩茎圆柱状到经常地四棱形或略似，，被微柔，短柔，或被绒，通常。

2.Rachis and pedicels lanuginose or tomentose; bracts orbicular-ovate, 5–7 mm, both surfaces densely sericeous; calyx adaxially densely sericeous; leaf base subcordate.

2.轴和花梗被绒或者被绒；卵形苞片圆形，5-7毫米，两面密被绢；正面花萼是密被绢；叶基部近心形。