Name: Achyronychia form greek chaff fingernail.
English: Onyxflower; Frost-mat.
Region: Mojave and Sonoran Deserts of northern Mexico and the U.S. states.
Botany: diminutive; lies in a small mat flat on the ground; sand; stems radiate prostrate in all directions, each only a few centimeters long; leaves thick, pale green, paddle-shaped, under 2 cm long; flowers tiny, dense bunches, in leaf axils, no petals, 5 thin shiny white sepals like tiny fingernails.