Found throughout the United States. Taproot with fibrous secondary roots. Young leaves opposite with each succeeding pair 90 from the preceding pair. Young leaves maroon or maroon-tinted on lower surface.
Leaves are thick, succulent and fleshy, with smooth margins.
Yellow in color with 5 petals, 5-10 mm wide, that open only when sunny. Flowers are found alone in the leaf axils or clustered at the ends of the branches.