Spigelia gentianoides is a rare species of flowering plant in the Loganiaceae known by the common names purpleflower pinkroot and gentian pinkroot. It is native to Alabama and Florida in the United States, where a few small populations remain. It is threatened by the loss and degradation of its habitat, and is a federally listed endangered species of the United States. Threats to this plant include logging, fire suppression, and overcollection. Silviculture is a threat, as land is cleared for pine plantations. At the Alabama glades the plant is threatened by quarrying.