(Hydrodendron) (Hydrodendron) is a biological genus in the family Haleciidae and order Leptothecatae (Thecate Hydroids).
Hydrodendron alternatum
Hydrodendron carchesium
Hydrodendron corrugatum
Hydrodendron expansum
Hydrodendron gracile
Hydrodendron laxum
Hydrodendron mirabile
Hydrodendron tottoni
Campalecium
Endothecium
Halecium
Hemitheca
Hydrodendron
Mitrocomium
Sagamihydra