(I saw a pantograph in a museum yesterday; it's weird, I swear HN is looking over my shoulder sometimes.)
Stories always fall between the cracks; it's normal for a story to get zero comments and maybe one upvote at one time, and hundreds of upvotes and comments another time.
When I've browsed completely random links from Wikipedia, the overwhelming stuff that comes up are names of places (like every little park or named lake in the world), names of anyone who has ever played professional sports no matter how minor, names of flowers, plants, political parties, parades, events, student organizations, and generally names of places, persons, and things.
Science is actually a tiny fraction of Wikipedia. What I'd call scientific concepts, like relativity, continental drift, evolution, big bang theory, dinosaur K-T extinction theory are an absolutely miniscule fraction of Wikipedia knowledge.
Assuming you mean a [partial] description of a plant, then that is botany -- individually, each page isn't a big concept, but I don't think they deserve to be lumped in with sports players etc.