I think I'd leave it. Whether I know all of the plants or not (I don't), the recitation of them really sets the image and tone of that sentence. Take it out, and you have something completely different. I suspect Wallace spent a lot of time on it.
You are probably right.
I did try to read that book twice, but kept getting lost in the wordage. That happens sometimes.
BWFoster is probably right that the sentence would work better for most people if about two thirds of it was hacked out.