See text The Loganiaceae are a family of flowering plants classified in order Gentianales.

There are not any great morphological characteristics to distinguish these taxa from others in the order Gentianales.

Many members of the Loganiaceae are extremely poisonous, causing death by convulsion.

Phylogenetic studies have demonstrated that this broadly defined Loganiaceae was a polyphyletic assemblage, and numerous genera have been removed from Loganiaceae to other families (sometimes in other orders), e.g., Gentianaceae, Gelsemiaceae, Plocospermataceae, Tetrachondraceae, Buddlejaceae, and Gesneriaceae.

[3][4] A more recent study considers some Labordia species synonymous with Geniostoma,[5] resulting in 12 genera in other sources.