Erect annual, 0.5-1 m. Stem, branches, and leaves rather densely patent-pubescent, often yellowish. Leaves chartaceous, narrowly elliptic to ovate, 6-9 by 2-4 cm, serrulate, bluntly acute, base truncate or cordate, often oblique; margin slightly rugose above; petiole 1-1.5 cm, uppermost leaves subsessile. Spurious racemes axillary and terminal, generally forming panicles 7-10 cm long, in fruit to 15 cm or more. Pedicels 2-3 mm. Bracts ovate-lanceolate, acuminate, cuneate at base, smaller than the calyx. Calyx tubular-campanulate, pubescent, purple, 3-5 mm long, in fruit 6-7 mm, upper tooth ovate, broad, 2 lower teeth lanceolate, 1.5-2 mm long, the lateral teeth shorter than the others, broad-ovate deltoid, bluntish. Corolla white with pale rosa markings on lip, expanded and recurved, 15-20 mm. Nutlets ovoid, 1.5 by 1 mm, rugose, dark-brown.
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