Children (12 direct children, 12 direct and indirect children):
Ceramium circinatum var. confluens
Ceramium circinatum var. syntrophum
Ceramium circinatum var. decipiens
Ceramium circinatum var. duriusculum
Ceramium circinatum var. trascurrens
Ceramium circinatum f. boreale
Ceramium circinatum f. densecorticatum
Ceramium circinatum f. divaricatum
Ceramium circinatum f. genuinum
Ceramium circinatum f. infernecorticatum
Ceramium circinatum f. rigidum
Ceramium circinatum f. tenue