Arbolean

The Arbolean were a species.

Zelopan disguised himself as an Arbolean. Tom Daley thought they looked like a humanoid/plant hybrid. (PROSE: The Golden Hendecahedron)

Behind the scenes
Throughout The Golden Hendecahedron several references to The Leisure Hive were made. The Arbolean are described to be similar to the Argolin, with Zelopan being described as having "light-green" skin with "yellow and green hair" that looked like a "bulb of garlic". The Presenter is described similar to the Foamasi, a race that appeared alongside the Argolins in the Leisure Hive.