monosiphonous

monosiphonous

[¦män·ō′sī·fə·nəs]
(biology)
Having a single central tube, as in the thallus of certain filamentous algae or the hydrocaulus of some hydrozoans.
References in periodicals archive ?
Description: Thallus diminutive and inconspicuous, erect, between 0.7 cm and 0.9 cm, with one calcified monostromatic blade on a monosiphonous stipe, light green (Fig.