Annuals, 1-3(-5) cm. Stems decumbent to erect. Leaves basal and/or cauline; opposite (crowded, seemingly whorled); subsessile or ± petiolate; blades spatulate to oblanceolate, entire. Heads discoid, in clusters (of 2-5, congested, total heads to 100+). Involucres cylindric to obconic, 2(-4) mm diam. Phyllaries 2(-3) in 1 series (basally distinct or connate, oblong, herbaceous). Ray florets 0. Disc florets 2(-3), bisexual, fertile; corollas white, pink, or purple, tubes slightly shorter than funnelform throats, lobes 5, deltate-ovate. Receptacles minute, epaleate. Cypselae cylindric to clavate, striate, glabrous; pappi falling, of ca. 20 basally connate, setiform to subulate, ± plumose scales (or flattened bristles). x = 7.