Annual up to 50 cm tall. Leaves membranous, lanceolate, narrowly oblong, rarely obovate-lanceolate, (1.25-)2-3.5 cm by 1.5-6(-7.5) mm; apex acuminate; base obtuse; nerves obscure, 3-6 pairs; petiole very short, c. 1 mm. Inflorescences terminal, 15-40-flowered; peduncles variable in length, very short, or up to 5.5 cm; pedicels 1-5 mm, flat but not dilated at the base, articulated at the top. Involucral bracts 4, united at the lower third or half into an obconical cup, 7—10(-15) mm long, the free parts ovate and acuminate, imbricate, the outer pair overlapping the inner pair, longer than wide, 6-8 by 2.5-4(-7) mm. Flowers 7-10 mm long, inserted on the cup-shaped part of the involucre, white, usually included in the involucral bracts, sometimes slightly protruding beyond them. Calyx lobes 4, imbricate, oblong, or slightly obovate, 1-2 mm long. Disk small and obscure. Stamens 1-1½ mm, slightly shorter than the calyx lobes. Ovary ovoid, 1½ mm long; style slightly protruding beyond the floral tube; stigma small, globose. Fruits ellipsoid, 3 by mm, slightly stiped.
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Erect shrub 0.1–0.5 m high. Leaves narrowly ovate to narrowly obovate; lamina 5–42 mm long, 1.5–12 mm wide. Inflorescence: receptacle 3–5 mm long at first, to 8 mm long in fruit; involucral bracts ovate or broadly ovate, 3.5–13 mm long, 2–10 mm wide, green; peduncle 1–9 cm long. Flowers white or creamy white; pedicel to 5 mm long. Hypanthium 7–10 mm long, glabrous. Sepals usually rather erect, 0.8–1.3 mm long. Stamens shorter than to shortly exceeding sepals; anthers 0.3–0.5 mm long, yellow.
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