Annual. Stems erect, usually branched, 2–10 cm. Herbage glabrate to glandular-puberulent. Leaves sessile, linear-lanceolate, serrate, 5–15 mm long. Flowers: calyx purplish, 3–5 mm long, ca. as long as the pedicel, teeth equal, up to 0.5 mm long; corolla yellow, 4–6 mm long, obscurely bilabiate, lobes subequal. Capsule 4–5 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Vernally moist soil of grasslands and rocky slopes in the foothills and montane zones.