Why do a bunch of things around the lab say 201 instead of 301?
Years ago, Taxonomy of Flowering Plants was a 200-level, 3-credit hour course, with one fewer lecture per week. After deciding that the course really was junior-level in content, the powers that be made it a 300-level course. If you see something marked 201, it means it probably dates from “the olden days”. Just assume it’s meant for you.