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四略似翼的，无，被柔，短柔，被绒的，通常后脱落。

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

枝具短柔到后脱落有的鳞屑与具爪鳞片混生的。

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

在日本叶鞘总显著具糙硬具瘤；最旧的，更下部的鞘具叶片在后脱落和斑点具瘤。