Botanical illustration of a plant

I am looking for a painter/drawer who has worked in the capacity of a scientific botanical illustrator. Its an artistic collaborative project I am working on and need to create a painted proposition of a plant hybrid between two plants. More information about exactly which 2 plants I can send across privately. But its important for the project's concept that we work with professionals who have worked with botany as scientific illustrators. Hand drawn only, size a4. Similar to below examples - just that it will be of a fictitious plant - a merger between 2 existing ones.