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?