Radiciflorous is a botanical term used to describe plants that flower directly from their root system. Finding synonyms for such a specific word can be tricky, but there are a few options. Some possible synonyms for radiciflorous might include root-flowering, rhizanthous, or geocarpic. Geocarpy refers specifically to plants that produce their fruit underground, but the term may also be used more broadly to describe plants that flower and fruit from their roots. Other potential synonyms could include root-blooming, root-flowered, or underground-flowering. While these terms might not be as precise as radiciflorous, they can still effectively describe the unique characteristics of plants that flower from their root systems.