Washington University in St Louis is one of the most popular schools in the United States for getting a doctor's degree in botany/plant biology. WUSTL is a large private not-for-profit university located in the suburb of Saint Louis. This isn't the only ranking where the school placed. It's also #1 in quality for doctor's degrees in botany/plant biology in Missouri. More information about a doctorate in botany/plant biology from Washington University in St Louis