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hydrorhiza

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hydrorhiza

the root-like base of a colonial COELENTERATE which fixes it to the substrate.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive
Description: Colonies orange or dark golden, erect, fragile, sparingly and irregularly branched, up to 12 mm high, always arising from a creeping hydrorhiza. Hydrocaulus monosiphonic; each branch arising from a slightly curved aphophysis given off below hydrothecae of pedicel from which if arises.
Newly settled individuals that did not develop to hydrocaulus and hydrorhiza elongation retained small numbers of AIs in the aboral tentacle tips (Al, 16.1 [+ or -] 13.1; S, 199.3 [+ or -] 60.9; D, 168.6 [+ or -] 54.7; MM, 35.9 [+ or -] 16.5; the total, 419.8 [+ or -] 71.8).
In general, a colony comprises two parts: a net of tubes (stolons or hydrorhiza) generally fixed to a substratum, and shoots (hydrocauli) emerging vertically from these stolons in a more or less regular pattern.
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