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

嫩茎圆柱状经常地四棱形或略似，，被微柔，短柔，或被绒，通常脱落。

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

小枝具短柔脱落有微小鳞屑与具爪鳞片混生。

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，更下部鞘具叶片在脱落和斑点具小瘤。