I agree with the 'editorial' aspect of this comment. The illustrator is able to draw the defining characteristics of the plant/subject and leave out what is no

I agree with the 'editorial' aspect of this comment. The illustrator is able to draw the defining characteristics of the plant/subject and leave out what is not important. Things like veins or leaf structure to define the genus are incredibly important. The editorial nature can bring that forward. With a picture, it is hard for a lay person to tell what details are classifying/important.