Plants annual; roots fleshy. Stems erect or suberect, fleshy, succulent; trichomes inconspicuous at nodes and in inflorescence; branches 5-35 cm. Leaf blades linear to lanceolate, terete to hemispheric, 5-15 × 1-3(-5) mm, apex acute; involucrelike leaves (3-)5-8. Flowers 9-15 mm diam.; petals yellow, obovate to oval-obovate, 5-8 × 2-5 mm, apex rounded; stamens 12-30; stigmas 5-7. Capsules subglobose, 3.3-5.5 mm diam. Seeds brownish red, dark brown, or rarely black, orbiculate or elongate, flattened, 0.6-0.65 mm; surface cells slightly raised, obscurely stellate, sometimes granular, tubercles absent. 2n = 16.
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