The result should be accurate drawings. It can be as simple as a single flower. The Museum of Natural History's illustration classes are open to anyone. Both Brown-Wing and Meszoly note that most of their students have some basic drawing skills, but they come from varied backgrounds. Classes contain biologists, teachers, gardeners, and professional artists.
Former students praise the diversity of the classes.
So many people have preconceived notions about what things look like and then, when they look closely, they're much more complex.