disarticulated

18(17) Inflorescence subtended by a broad, 2-keeled prophyll; rachilla internodes usually distinct and disarticulating.

花序被包着以一宽阔的部分，2龙骨状；小穗轴节清楚和脱节。

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；最旧的，更下部的鞘叶片在后脱落和小瘤。