地下茎，根茎，块茎：任何其它植物的地下部分，尤指根茎、球茎或块茎等地下茎。

Any of various other underground plant parts, especially an underground stem such as a rhizome, corm, or tuber.

不定根和地下茎的周皮发达，栓质化程度高；

Adventitious roots and rhizome have much periderm, the suppository level is high;

它主要通过地下茎传播；当根系统碎片或整个植物漂浮到一个区域并生根，或当种子漂浮到一个合适的区域并发芽时，菌落就形成了。

It spreads primarily by underground stems; colonies form when pieces of the root system or whole plants float into an area and take root or when seeds float into a suitable area and germinate.