Surrounding each nucleus is a cone-shaped chloroplast which is stellate viewed from the front, each with a central pyrenoid.

Asexual reproduction occurs by zoospores, which have two flagella, a stigma and a parietal with a pyrenoid.

The zoospores and gametes are released when the entire cell wall dissolves.

[2] Lobocharacium is most closely related to the genus Characiosiphon,[3] and shares many morphological characters, including the multinucleate cells with many stellate chloroplasts.

Additionally, the zoospores and gametes in Characiosiphon are released through a pore in the cell wall.