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Leaves or leaf-like bracts spreading, opposite or opposite or nearly so, 8–20(35) x 2–9 mm., elliptic to linear or linear-lanceolate, obtuse to rounded, entire to crenate or with two small teeth, lower shortly petiolate, hispid.
Erect herb, up to 0.6 m high. Stems slender, branched. Leaves elliptic or lanceolate-obtuse, often with a few obscure teeth. Filaments bearded. Flowers bright yellow.
Calyx 5–7(8) mm. long, campanulate, shortly hispid; lobes 1.5–3.5(5) mm. long, subequal, broadly triangular, obtuse, shortly hisute on margin, of ten densely so.
Erect annual, 15–45 cm. tall, branched; stems straight, stout to flexuous, patent-hispid, floriferous in upper part of stem, not generally throughout.
Stamens subequal; filaments all bearded, at times densely so; anthers not apiculate.
Bracteoles linear, shorter than bracts, subglabrous to shortly hispid.
Capsule about 4.5(9) x 4.5(9) mm., globose to broadly ovoid.
Corolla yellow with purplish veins, much longer than calyx.
Flowers solitary in axils of leaf-like bracts, pedicellate.
Pedicels 1–5(7) mm. long.
