glabrescent

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

小枝短柔毛到后脱落有微小鳞屑毛与爪鳞片混生。

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

在日本叶鞘总显著糙硬毛瘤；最旧，更下部鞘叶片在后脱落和斑点小瘤。

leaf blade broadly cordate or broadly hastate-cordate, 5-10 × 3-8 cm, abaxially densely brown villous or strigillose along veins, adaxially sparsely strigillose or glabrescent, base deeply cordate;

叶片心形或形心形，5-10*3-8厘米，背面浓密棕色长柔毛或沿脉，正面稀疏短糙伏毛或后脱落，基部深心形；