Third post in the series, in trying to figure out which symmetry group is being showcased.  In order to do this, you must determine if there are any mirrors, any glides, any rotation points, any translations. Go for it! Let me know if you figure it out in the comments section below.

Orangement tessellation by Francine Champagne, ©2015 — Symétruc fouillis orange

The zoomed out version might be helpful.

Orangement tessellation by Francine Champagne, ©2015 — Symétruc fouillis orange

No no no, I took out the symmetry group in the tags below.