Herbs annual, 15-30 cm tall. Stem erect, not striate, ribbed, gray-white cottony pubescent; branches sparse, ascending or oblique, slender, usually slightly curved. Leaves linear, complanate, 0.5-1.2 cm × 1-2.5 mm, densely sericeous on both surfaces, base attenuate, apex shortly acute. Flowers bisexual, usually 2 or 3 per axillary glomerule. Perianth greenish, subglobose, semiappressed light yellowish pilose; segments broadly ovate, apex acute; winglike appendages usually spreading, light brownish yellow, sublanceolate, 2-3.5 mm, membranous, margin lacerate, apex caudate-acuminate. Stamens 5; filaments exserted; anthers oblong, ca. 0.4 mm. Style very short; stigmas 2, light brown, filiform. Utricle obovoid; pericarp slightly whitish, membranous, glabrous. Seed horizontal, dark red-brown, ca. 0.8 mm; perisperm coherent, brown. Fl. and fr. May-Jul.
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