In July of last year some artists I knew were using the prompt of a Monster Girl month I decided instead of doing a bunch of different monster types I would stick with just one an Alarune.
Alarunes are essentially creature's whose lower halves are flowers and top halves are women. I had several people suggest flower types to me and made quite a few over the month I attempted to give them all their own unique sort of look usually based off of the region they came from, a fact about the flower itself, or a play on it's name. And as an additional restriction I only used colors that were picked from the flower itself (with some exceptions).
Note: While I wanted to stick with the Alarune theme I did play around with the design incorporating the ideas of other monster types into some of the designs