Acrosiphonia orientalis (J.Agardh) P.C. Silva 1996

    Thalli dark green in colour, caespitose up to 6 cm tall, bushy and closely branched like corymbose tufts, filamentous; filaments repeatedly branched, branches sub dichotomous to pseudo-dichotomously alternately branched from the upper parts or lower half of the branches; cells sub-cylindrical tapering below with thick walls; the characteristics downwardly growing rhizoids arising from the lower ends of the cells. Lower cells of branches measure up to 2.4mm in length and 170-300 μm in width. Cells gradually reducing in size towards the apex of the thallus. Cells measures 84-70 μm in length and 3-12 μm in width.