Some really interesting Mordremoth concept art by Carlyn Lim.

I think it's official Anet art - Carlyn Lim was mentioned in GW2's game credits in the art section. This is what Mordremoth could've been.

Click me for badass she-Mordremoth art.

Click me to go to Carlyn Lim's ArtStation post.

Some more really interesting plant creature art.