O. princeps is dark blue green in colour due to the presence of two phycobilin pigments: phycocyanin and phycoerythrin.

A cytoplasmic sheath is present around the cells which is very thin, hyaline and indistinct.

The individual cells within a trichome are round in shape and much wider than they are long.

One to three notches per slit were observed by Uma Rani et al.

Reproduction takes place only by vegetative methods namely fragmentation and hormogonia.