Doesn’t it come up again in The Trouble with Tribbles or something? Or anyway in Trials & Tribble-ations, apparently.
https://memory-alpha.fandom.com/wiki/Trillium
#StarTrek #AllStarTrek #StarTrekTOS #StarTrekDS9 #ErrandOfMercy #TrialsAndTribbleations
Trillium was a substance that was regularly being traded in the 23rd and 24th century. In 2267, Spock posed as a trader of kevas and trillium while on Organia. (TOS: "Errand of Mercy") Later, in 2373, Arne Darvin made the same claim while aboard the USS Defiant. (DS9: "Trials and Tribble-ations") Trillium at Memory Beta, the wiki for licensed Star Trek works
Carl Shirley
Darth Hideout 🏳️🌈