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Information Annuals, 1–50(–70) cm. Stems 1, erect, or 2–10+, ascending to prostrate. Leaves cauline; alternate; blades subulate to obovate. Heads usually in glomerules of 2–10(–14) in racemiform to paniculiform or dichasiiform arrays, or some [all] borne singly. Involucres 0 or inconspicuous. Phyllaries 0, vestigial, 1–4 (unequal), or 4–6 (equal). Receptacles fungiform to obovoid (heights 0.4–1.6 times diams.), glabrous. Pistillate paleae (except usually innermost) readily or tardily falling, erect to ascending; bodies with 5+ nerves (nerves ± parallel, obscure), lanceolate to ovate or boat-shaped, ± saccate most of lengths (obcompressed to terete, sometimes ± galeate, each ± enclosing a floret); wings erect to incurved (apices blunt). Innermost paleae usually all pistillate, in some species bisexual and pistillate, persistent, usually 5 or 8, spreading (and enlarged) in fruit, surpassing other pistillate paleae; bodies lanceolate to ovate. Pistillate florets 14–45+. Functionally staminate florets 0. Bisexual florets 2–10; corolla lobes 4–5, ± equal. Cypselae brown, dimorphic: outer compressed to obcompressed, obovoid to ± cylindric, straight or curved, longer than inner, abaxially gibbous, faces glabrous, smooth, shiny; inner ± terete, faces glabrous, usually papillate to muriculate, sometimes smooth, dull; corolla scars apical to subapical; pappi: outer pistillate 0, inner pistillate and bisexual of (11–)13–28+ bristles (visible in heads). x = 14.

Information Plants 2–20[–30] cm. Stems 1, ± erect, or 2–5, ascending to spreading; branches leafy between proximal forks, remaining grayish, arachnoid-sericeous. Leaves narrowly elliptic to narrowly ovate, largest 7–10(–12) × 1–1.5(–2) mm, pliant; longest capitular leaves 0.8–1.5 times head heights, acute. Heads in glomerules of 3–7 in mostly dichasiiform, sometimes racemiform or paniculiform arrays, ± pyriform, largest 3–3.5 × 2 mm. Phyllaries usually 5, equal, ± like paleae. Receptacles ± fungiform, mostly 0.3–0.4 mm, heights 0.4–0.6 times diams. Pistillate paleae (except innermost) 8–12 in 1–2 series, ± vertically ranked, saccate, inflexed 70–90° proximally, gibbous, ± galeate, longest 2.6–3.1 mm, distal 15–30% of lengths glabrous abaxially; bodies ± bony, ± terete; wings prominent. Innermost paleae ± 8, spreading in 2 series, pistillate. Pistillate florets: outer 8–12 epappose, inner 18–30+ pappose. Bisexual florets 3–5; corollas 1.6–2.1 mm, lobes mostly 4, brownish to yellowish. Cypselae: outer incurved, proximally ± horizontal, distally erect, compressed, 0.8–0.9 mm; inner papillate; pappi mostly of 13–16 bristles falling in 1s or 2s, 1.8–2.1 mm. 2n = 28 (Byelorussia, former Czechoslovakia, Germany)