1.Branchlets pubescent to glabrescent with minute scurfy hairs intermixed with unguicular scales.

1.小枝到后脱落有微小鳞屑与爪鳞片混生。

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

2.嫩茎圆柱到经常地四棱形或略似翼，无，被微，，或被绒，常后脱落。

3.In Japan the leaf sheaths are always conspicuously tuberculate-hispid; the older, lower sheaths with disarticulated blades are glabrescent and spotted with tubercles.

3.在日本叶鞘总显著糙硬瘤；最旧，更下部鞘叶片在后脱落和斑点小瘤。