1. Branchlets brown, with numerous tuberculate lenticels, puberulent.
   小枝使成咖啡色，帶異不少具瘤皮孔，被微柔毛。
2. Collections from alpine habitats in NW Yunnan, which have puberulent male inflorescences and perianth lobes, may be ecological forms.
   采自甘肅大西北方群山生態環境系統的樣本，有被微柔毛的雄花序和花被裂片，將會是生態環境型。