hydrorhiza

/hahy-druh-rahy-zuh/US // ˌhaɪ drəˈraɪ zə //

水草,水蛭,水草丛生,水草根

Definitions

n.名词 noun

1
plural hy·dro·rhi·zae [hahy-druh-rahy-zee]. /ˌhaɪ drəˈraɪ zi/.
- : the rootlike base of a hydroid colony, by which it is attached to the substratum.

The colonies are cylindrical tubes about one quarter of an inch in height, rising from a creeping stem (hydrorhiza).
In some cases, however, medusa-buds are formed on the hydrorhiza, as in Hydrocorallines.
The foot by which it is attached often sends out root-like processes—the hydrorhiza (c).
As a general rule polyp-buds are produced from the hydrorhiza and hydrocaulus, while medusa-buds are formed on the hydranth.