Listen to the violets.

[-JKP-]

Of course that is possible, but that would more imply that the illustration is a representation of one particular folded, possibly dried, clump of violets and not a good, general representation of violets in their natural state, which I feel would be more probable in a standard presentation - whether through the artist's ignorance, though that seems unlikely in this case, or for some other reason.

The way the VMS violet is drawn looks more like a specimen than a live plant. These violets are quite bushy, it's hard to see individual stems and leaves when they are in the wild. When you dry and flatten them, these details are easy to see. Notice how all the leaves are facing the viewer. That's how specimens look. Live plants don't look like this at all, the leaves are in and around and behind each other, and the stems, and they face in many directions.