Gloeoactinium

綠藻門 Chlorophyta

綠藻綱 Chlorophyceae

環藻目 Sphaeropleales

柵藻科 Scenedesmaceae

膠星藻屬 Gloeoactinium Smith, 1926

描述：Green colony of ovate-cuneate shaped cells apposed at their bases in radiating groups of two or four;  several of these groups lie toward the periphery of a wide homogeneous gelatinous matrix .  A single chloroplast fills each cell.  There is no pyrenoid.