Anything else a true Alien and Predator fighter would grow there?
I've always loved the idea of the black mold from Labyrinth (whether that part is true or not, who knows) so when they actually dropped the caminus leaves in Phalanx I was really pleased. I'd love to see more of that show up in some form or another later on.
I admit it did take me a minute to think what you could mean with Calendula and then I remembered Prey. Though I think the actual flower in the film is fictional, I assume Calendula has some of the very real properties to lower body tempature?