Perennials, to 30+ cm (rhizomatous or stoloniferous). Stems sprawling, ascending, branched mostly from bases. Leaves opposite; sessile; blades spatulate to linear (succulent), margins entire, faces glabrous. Heads radiate [discoid], borne singly. Involucres cylindric to obconic, 4-8+ mm diam. Phyllaries 12-15 in 3+ series (ovate to lanceolate, unequal, succulent to membranous). Receptacles conic, epaleate. Ray florets [0] 3-10, pistillate, fertile; corollas yellow. Disc florets 20-50+, bisexual, fertile; corollas yellow, tubes about equaling narrow, cylindric throats, lobes 5, deltate. Cypselae obconic to clavate or columnar (10-ribbed, glabrous); pappi usually 0, rarely persistent, of 1-5 subulate scales. x = 19.