They look quite nice as a Minor Race in Traveller.
Given their pacifistic nature, it would take quite some doing to elevate them into a Traveller Major Race (dominated by animal carnivores, omnivores, and an exceptionally violent herbivorous species).
Myself, I would make them as some mysterious rumoured Major Race, about 250 parsecs coreward of the Imperium, beyond the Vargr Extents. To be the first discoverer/trader of a completely separate alien civilization would be a sensational thing in Charted Space.
And excite the unbridled envy of the Vargr, who will demand why they didn’t discover the Space Ents first… or just insist that they did, regardless of the actual facts.