Taxonomy

Kingdom Plantae
    Division Magnoliophyta
        Class Magnoliopsida
            Subclass Asteridae
                Order Solanales
                    Family Polemoniaceae
                        Genus Phlox
                            Species Phlox nivalis
                               subspecies texensis

Phlox nivalis texensis was first officially charaterized by Lundell on April 18, 1942.  The synonym P. texensis was rejected for Texas Trailing Phlox as it was determined to be a subspecies of Phlox nivalis.