Etymology:hy.dro.co.le.o.i’des.N.L. neut. n.Hydrocoleum, a cyanobacterial genus; L. adj. suff.-oides, resembling, similar; from Gr. neut. adj. suff.-eides, resembling, similar; from Gr. neut. n.eîdos, that which is seen, form, shape, figure; N.L. neut. adj.hydrocoleoides, resembling Hydrocoleum