Annual. Stems prostrate to erect, simple or branched, 4–12 cm. Herbage glandular-villous with septate hairs. Leaves petiolate; the blade ovate, dentate, 4–12 mm long. Flowers: calyx 4–7 mm long, teeth equal, 1 mm or less long; pedicel 2 to 3 times as long as calyx; corolla yellow, 7–11 mm long, moderately bilabiate, lower lobes larger, palate with red spots. Capsule 3–6 mm long
(Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).