Slender-Horned Spineflower (Dodecahema leptoceras) is a prostrate annual with leaves in a basal rosette, from the middle of the rosette, which may be up to 4.5 in (11.4 cm) in diameter, the plant sends up a flower stalk 6.8 in (17.3 cm) high. Three-lobed horned bracts occur at nodes on the flower stalk. Leaves and bracts turn bright red with age. Flowers are compound, consisting of three or more tiny inconspicuous blossoms in a ring, the species has also been known as Centrostegia leptoceras.