花萼

1.Calyx cup-shaped, almost truncate, outside pulverulent pubescent.

花萼杯状，几乎截形，外面粉状短柔毛。

2.Calyx 5- or rarely 4-partite, quincuncial, basal glands usually present.

花萼5或者很少4分裂，通常基部腺体宿存，梅花形，基部通常有腺体。

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

轴和花被绒毛或者被绒毛；卵形苞片圆形，5-7毫米，两面密被绢毛；正面的花萼是密被绢毛；叶基部近心形。