Plant: Annual; hairs appressed to spreading, fine or coarse; stem prostrate to ascending, generally 1-4 dm Leaves: simple, generally smaller upward, cauline; lower generally opposite, 1-4 cm; upper alternate INFLORESCENCE: raceme or spike, coiled in bud, generally elongate, bracted throughout; pedicels generally 0-1 mm Flowers: bisexual; sepals fused below middle, 2-10 mm in fruit; calyx ± 3 mm; corolla 1-7 mm wide, all white or yellow inside tube Fruit: Fruit: nutlet 1-2 mm, ovoid; midrib, lateral ribs, cross-ribs sharp; scar at tip of oblique stalk Misc: Dry places, many habitats; < 2300 m.