Annual herbs with tomentose to glabrous foliage. Stems branched, erect, 5–80 cm. Leaves short-petiolate; blades 2–7 cm long, lanceolate to narrowly oblong with toothed margins. Inflorescence of interrupted spikes in an open, leafy panicle. Flowers perfect or female; calyx lobes 5, united to above middle, 2–4 mm across; stamens 5. Fruit a subglobose achene, enclosed in the wing-like calyx; the seed flat, horizontal, smooth, 1.5 mm across (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)..